diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4add7f4cfc9..ed03ec905a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,8 @@
 ### ⬆️ Improved
 
 ### ✅ Added
+- Add `ChatClient::partialUpdateMember` for updating a `Member` in the scope of a `Channel`. [#5497](https://github.com/GetStream/stream-chat-android/pull/5497)
+- Add `ChannelClient::partialUpdateMember` for updating a `Member` in the scope of a `Channel`. [#5497](https://github.com/GetStream/stream-chat-android/pull/5497)
 
 ### ⚠️ Changed
 
diff --git a/stream-chat-android-client/api/stream-chat-android-client.api b/stream-chat-android-client/api/stream-chat-android-client.api
index 7287ecea964..7255386a6cc 100644
--- a/stream-chat-android-client/api/stream-chat-android-client.api
+++ b/stream-chat-android-client/api/stream-chat-android-client.api
@@ -108,6 +108,8 @@ public final class io/getstream/chat/android/client/ChatClient {
 	public final fun muteUser (Ljava/lang/String;)Lio/getstream/result/call/Call;
 	public final fun muteUser (Ljava/lang/String;Ljava/lang/Integer;)Lio/getstream/result/call/Call;
 	public static synthetic fun muteUser$default (Lio/getstream/chat/android/client/ChatClient;Ljava/lang/String;Ljava/lang/Integer;ILjava/lang/Object;)Lio/getstream/result/call/Call;
+	public final fun partialUpdateMember (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/util/Map;Ljava/util/List;)Lio/getstream/result/call/Call;
+	public static synthetic fun partialUpdateMember$default (Lio/getstream/chat/android/client/ChatClient;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/util/Map;Ljava/util/List;ILjava/lang/Object;)Lio/getstream/result/call/Call;
 	public final fun partialUpdateMessage (Ljava/lang/String;Ljava/util/Map;Ljava/util/List;)Lio/getstream/result/call/Call;
 	public static synthetic fun partialUpdateMessage$default (Lio/getstream/chat/android/client/ChatClient;Ljava/lang/String;Ljava/util/Map;Ljava/util/List;ILjava/lang/Object;)Lio/getstream/result/call/Call;
 	public final fun partialUpdateThread (Ljava/lang/String;Ljava/util/Map;Ljava/util/List;)Lio/getstream/result/call/Call;
@@ -670,6 +672,8 @@ public final class io/getstream/chat/android/client/channel/ChannelClient {
 	public final fun muteUser (Ljava/lang/String;)Lio/getstream/result/call/Call;
 	public final fun muteUser (Ljava/lang/String;Ljava/lang/Integer;)Lio/getstream/result/call/Call;
 	public static synthetic fun muteUser$default (Lio/getstream/chat/android/client/channel/ChannelClient;Ljava/lang/String;Ljava/lang/Integer;ILjava/lang/Object;)Lio/getstream/result/call/Call;
+	public final fun partialUpdateMember (Ljava/lang/String;Ljava/util/Map;Ljava/util/List;)Lio/getstream/result/call/Call;
+	public static synthetic fun partialUpdateMember$default (Lio/getstream/chat/android/client/channel/ChannelClient;Ljava/lang/String;Ljava/util/Map;Ljava/util/List;ILjava/lang/Object;)Lio/getstream/result/call/Call;
 	public final fun pinMessage (Lio/getstream/chat/android/models/Message;I)Lio/getstream/result/call/Call;
 	public final fun pinMessage (Lio/getstream/chat/android/models/Message;Ljava/util/Date;)Lio/getstream/result/call/Call;
 	public final fun query (Lio/getstream/chat/android/client/api/models/QueryChannelRequest;)Lio/getstream/result/call/Call;
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/ChatClient.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/ChatClient.kt
index 4ec48817485..ea5d6641bfe 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/ChatClient.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/ChatClient.kt
@@ -2350,6 +2350,34 @@ internal constructor(
         )
     }
 
+    /**
+     * Updates specific fields of member data, retaining the custom data fields which were set previously.
+     *
+     * @param channelType The channel type. ie messaging.
+     * @param channelId The channel id. ie 123.
+     * @param userId The ID of the member to be updated.
+     * @param set The key-value data to be updated in the member data.
+     * @param unset The list of keys to be removed from the member data.
+     *
+     * @return Executable async [Call] responsible for updating member data.
+     */
+    @CheckResult
+    public fun partialUpdateMember(
+        channelType: String,
+        channelId: String,
+        userId: String,
+        set: Map<String, Any> = emptyMap(),
+        unset: List<String> = emptyList(),
+    ): Call<Member> {
+        return api.partialUpdateMember(
+            channelType = channelType,
+            channelId = channelId,
+            userId = userId,
+            set = set,
+            unset = unset,
+        )
+    }
+
     /**
      * Enables slow mode for the channel. When slow mode is enabled, users can only send a message every
      * [cooldownTimeInSeconds] time interval. The [cooldownTimeInSeconds] is specified in seconds, and should be
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/ChatApi.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/ChatApi.kt
index 869e4c891c4..d351a871a06 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/ChatApi.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/ChatApi.kt
@@ -371,6 +371,15 @@ internal interface ChatApi {
         skipPush: Boolean?,
     ): Call<Channel>
 
+    @CheckResult
+    fun partialUpdateMember(
+        channelType: String,
+        channelId: String,
+        userId: String,
+        set: Map<String, Any>,
+        unset: List<String>,
+    ): Call<Member>
+
     @CheckResult
     fun queryMembers(
         channelType: String,
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/internal/ExtraDataValidator.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/internal/ExtraDataValidator.kt
index e0d97d1883b..8ef28acd472 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/internal/ExtraDataValidator.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api/internal/ExtraDataValidator.kt
@@ -20,6 +20,7 @@ import io.getstream.chat.android.client.api.ChatApi
 import io.getstream.chat.android.client.api.ErrorCall
 import io.getstream.chat.android.models.Channel
 import io.getstream.chat.android.models.CustomObject
+import io.getstream.chat.android.models.Member
 import io.getstream.chat.android.models.Message
 import io.getstream.chat.android.models.User
 import io.getstream.result.Error
@@ -86,6 +87,18 @@ internal class ExtraDataValidator(
             .withExtraDataValidation(set)
     }
 
+    override fun partialUpdateMember(
+        channelType: String,
+        channelId: String,
+        userId: String,
+        set: Map<String, Any>,
+        unset: List<String>,
+    ): Call<Member> {
+        return delegate
+            .partialUpdateMember(channelType, channelId, userId, set, unset)
+            .withExtraDataValidation(set)
+    }
+
     private fun <T : CustomObject> Call<List<T>>.withExtraDataValidation(
         objects: List<T>,
     ): Call<List<T>> {
@@ -144,6 +157,7 @@ internal class ExtraDataValidator(
             is Channel -> extraData.keys.filter(reservedInChannelPredicate)
             is Message -> extraData.keys.filter(reservedInChannelPredicate)
             is User -> extraData.keys.filter(reservedInChannelPredicate)
+            is Member -> extraData.keys.filter(reservedInMemberPredicate)
             else -> emptyList()
         }
     }
@@ -153,6 +167,7 @@ internal class ExtraDataValidator(
             Channel::class -> keys.filter(reservedInChannelPredicate)
             Message::class -> keys.filter(reservedInMessagePredicate)
             User::class -> keys.filter(reservedInUserPredicate)
+            Member::class -> keys.filter(reservedInMemberPredicate)
             else -> emptyList()
         }
     }
@@ -166,6 +181,7 @@ internal class ExtraDataValidator(
             is Channel -> "channel"
             is Message -> "message"
             is User -> "user"
+            is Member -> "member"
             else -> ""
         }
     }
@@ -210,8 +226,24 @@ internal class ExtraDataValidator(
             "updated_at",
         )
 
+        private val reservedInMember = setOf(
+            "user",
+            "created_at",
+            "updated_at",
+            "invited",
+            "invite_accepted_at",
+            "invite_rejected_at",
+            "shadow_banned",
+            "banned",
+            "channel_role",
+            "notifications_muted",
+            "status",
+            "ban_expires",
+        )
+
         private val reservedInChannelPredicate: (String) -> Boolean = reservedInChannel::contains
         private val reservedInMessagePredicate: (String) -> Boolean = reservedInMessage::contains
         private val reservedInUserPredicate: (String) -> Boolean = reservedInUser::contains
+        private val reservedInMemberPredicate: (String) -> Boolean = reservedInMember::contains
     }
 }
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/MoshiChatApi.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/MoshiChatApi.kt
index 96d0f7a8500..6a515e8203e 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/MoshiChatApi.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/MoshiChatApi.kt
@@ -78,6 +78,7 @@ import io.getstream.chat.android.client.api2.model.requests.UnblockUserRequest
 import io.getstream.chat.android.client.api2.model.requests.UpdateChannelPartialRequest
 import io.getstream.chat.android.client.api2.model.requests.UpdateChannelRequest
 import io.getstream.chat.android.client.api2.model.requests.UpdateCooldownRequest
+import io.getstream.chat.android.client.api2.model.requests.UpdateMemberPartialRequest
 import io.getstream.chat.android.client.api2.model.requests.UpdateMessageRequest
 import io.getstream.chat.android.client.api2.model.requests.UpdateUsersRequest
 import io.getstream.chat.android.client.api2.model.requests.UpstreamOptionDto
@@ -785,6 +786,23 @@ constructor(
         ).map(this::flattenChannel)
     }
 
+    override fun partialUpdateMember(
+        channelType: String,
+        channelId: String,
+        userId: String,
+        set: Map<String, Any>,
+        unset: List<String>,
+    ): Call<Member> {
+        return channelApi.partialUpdateMember(
+            channelType = channelType,
+            channelId = channelId,
+            userId = userId,
+            body = UpdateMemberPartialRequest(set, unset),
+        ).map { response ->
+            response.channel_member.toDomain(currentUserIdProvider())
+        }
+    }
+
     private fun flattenChannel(response: ChannelResponse): Channel {
         return response.channel.toDomain(currentUserIdProvider(), null).let { channel ->
             channel.copy(
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/endpoint/ChannelApi.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/endpoint/ChannelApi.kt
index 1b8a01555e7..378b1c7a08a 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/endpoint/ChannelApi.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/endpoint/ChannelApi.kt
@@ -35,6 +35,8 @@ import io.getstream.chat.android.client.api2.model.requests.TruncateChannelReque
 import io.getstream.chat.android.client.api2.model.requests.UpdateChannelPartialRequest
 import io.getstream.chat.android.client.api2.model.requests.UpdateChannelRequest
 import io.getstream.chat.android.client.api2.model.requests.UpdateCooldownRequest
+import io.getstream.chat.android.client.api2.model.requests.UpdateMemberPartialRequest
+import io.getstream.chat.android.client.api2.model.requests.UpdateMemberPartialResponse
 import io.getstream.chat.android.client.api2.model.response.ChannelResponse
 import io.getstream.chat.android.client.api2.model.response.CompletableResponse
 import io.getstream.chat.android.client.api2.model.response.EventResponse
@@ -135,6 +137,14 @@ internal interface ChannelApi {
         @Body body: InviteMembersRequest,
     ): RetrofitCall<ChannelResponse>
 
+    @PATCH("/channels/{type}/{id}/member/{user_id}")
+    fun partialUpdateMember(
+        @Path("type") channelType: String,
+        @Path("id") channelId: String,
+        @Path("user_id") userId: String,
+        @Body body: UpdateMemberPartialRequest,
+    ): RetrofitCall<UpdateMemberPartialResponse>
+
     @POST("/channels/{type}/{id}/event")
     fun sendEvent(
         @Path("type") channelType: String,
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/mapping/MemberMapping.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/mapping/MemberMapping.kt
index 9750db74a84..e524a353678 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/mapping/MemberMapping.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/mapping/MemberMapping.kt
@@ -35,6 +35,7 @@ internal fun DownstreamMemberDto.toDomain(currentUserId: UserId?): Member =
         notificationsMuted = notifications_muted,
         status = status,
         banExpires = ban_expires,
+        extraData = extraData,
     )
 
 internal fun Member.toDto(): UpstreamMemberDto =
@@ -51,4 +52,5 @@ internal fun Member.toDto(): UpstreamMemberDto =
         notifications_muted = notificationsMuted,
         status = status,
         ban_expires = banExpires,
+        extraData = extraData,
     )
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/dto/MemberDtos.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/dto/MemberDtos.kt
index 6cee0507c31..c3aba0c9b4c 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/dto/MemberDtos.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/dto/MemberDtos.kt
@@ -17,8 +17,17 @@
 package io.getstream.chat.android.client.api2.model.dto
 
 import com.squareup.moshi.JsonClass
+import io.getstream.chat.android.core.internal.StreamHandsOff
 import java.util.Date
 
+/**
+ * See [io.getstream.chat.android.client.parser2.adapters.UpstreamMemberDtoAdapter] for
+ * special [extraData] handling.
+ */
+@StreamHandsOff(
+    reason = "Field names can't be changed because [CustomObjectDtoAdapter] class uses reflections to add/remove " +
+        "content of [extraData] map",
+)
 @JsonClass(generateAdapter = true)
 internal data class UpstreamMemberDto(
     val user: UpstreamUserDto,
@@ -33,8 +42,18 @@ internal data class UpstreamMemberDto(
     val notifications_muted: Boolean?,
     val status: String?,
     val ban_expires: Date?,
-)
 
+    val extraData: Map<String, Any>,
+) : ExtraDataDto
+
+/**
+ * See [io.getstream.chat.android.client.parser2.adapters.DownstreamMemberDtoAdapter] for
+ * special [extraData] handling.
+ */
+@StreamHandsOff(
+    reason = "Field names can't be changed because [CustomObjectDtoAdapter] class uses reflections to add/remove " +
+        "content of [extraData] map",
+)
 @JsonClass(generateAdapter = true)
 internal data class DownstreamMemberDto(
     val user: DownstreamUserDto,
@@ -49,4 +68,6 @@ internal data class DownstreamMemberDto(
     val notifications_muted: Boolean?,
     val status: String?,
     val ban_expires: Date?,
-)
+
+    val extraData: Map<String, Any>,
+) : ExtraDataDto
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/requests/UpdateMemberPartialRequest.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/requests/UpdateMemberPartialRequest.kt
new file mode 100644
index 00000000000..bc50b605906
--- /dev/null
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/requests/UpdateMemberPartialRequest.kt
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2014-2024 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.client.api2.model.requests
+
+import com.squareup.moshi.JsonClass
+
+/**
+ * Used to form a partial member update request.
+ *
+ * @param set Map of key-value pairs to set.
+ * @param unset List of keys to unset.
+ */
+@JsonClass(generateAdapter = true)
+internal data class UpdateMemberPartialRequest(
+    val set: Map<String, Any>,
+    val unset: List<String>,
+)
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/requests/UpdateMemberPartialResponse.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/requests/UpdateMemberPartialResponse.kt
new file mode 100644
index 00000000000..3475b1f3594
--- /dev/null
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/api2/model/requests/UpdateMemberPartialResponse.kt
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2014-2024 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.client.api2.model.requests
+
+import com.squareup.moshi.JsonClass
+import io.getstream.chat.android.client.api2.model.dto.DownstreamMemberDto
+
+/**
+ * Response model of the partial member update.
+ *
+ * @param channel_member The updated member object.
+ */
+@JsonClass(generateAdapter = true)
+internal data class UpdateMemberPartialResponse(
+    val channel_member: DownstreamMemberDto,
+)
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/channel/ChannelClient.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/channel/ChannelClient.kt
index 17198caa168..db2229299ba 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/channel/ChannelClient.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/channel/ChannelClient.kt
@@ -625,6 +625,22 @@ public class ChannelClient internal constructor(
         return client.updateChannelPartial(channelType, channelId, set, unset)
     }
 
+    /**
+     * Updates specific fields of custom data for a given member.
+     *
+     * @param userId The user id of the member to update.
+     * @param set The key-value data to be updated in the member data.
+     * @param unset The list of keys to be removed from the member data.
+     */
+    @CheckResult
+    public fun partialUpdateMember(
+        userId: String,
+        set: Map<String, Any> = emptyMap(),
+        unset: List<String> = emptyList(),
+    ): Call<Member> {
+        return client.partialUpdateMember(channelType, channelId, userId, set, unset)
+    }
+
     /**
      * Enables slow mode for the channel. When slow mode is enabled, users can only send a message every
      * [cooldownTimeInSeconds] time interval. The [cooldownTimeInSeconds] is specified in seconds, and should be
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/parser2/MoshiChatParser.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/parser2/MoshiChatParser.kt
index f4c7d20e55c..6ac01fa83c3 100644
--- a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/parser2/MoshiChatParser.kt
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/parser2/MoshiChatParser.kt
@@ -32,6 +32,7 @@ import io.getstream.chat.android.client.parser.ChatParser
 import io.getstream.chat.android.client.parser2.adapters.AttachmentDtoAdapter
 import io.getstream.chat.android.client.parser2.adapters.DateAdapter
 import io.getstream.chat.android.client.parser2.adapters.DownstreamChannelDtoAdapter
+import io.getstream.chat.android.client.parser2.adapters.DownstreamMemberDtoAdapter
 import io.getstream.chat.android.client.parser2.adapters.DownstreamMessageDtoAdapter
 import io.getstream.chat.android.client.parser2.adapters.DownstreamModerationDetailsDtoAdapter
 import io.getstream.chat.android.client.parser2.adapters.DownstreamReactionDtoAdapter
@@ -39,6 +40,7 @@ import io.getstream.chat.android.client.parser2.adapters.DownstreamUserDtoAdapte
 import io.getstream.chat.android.client.parser2.adapters.EventAdapterFactory
 import io.getstream.chat.android.client.parser2.adapters.ExactDateAdapter
 import io.getstream.chat.android.client.parser2.adapters.UpstreamChannelDtoAdapter
+import io.getstream.chat.android.client.parser2.adapters.UpstreamMemberDtoAdapter
 import io.getstream.chat.android.client.parser2.adapters.UpstreamMessageDtoAdapter
 import io.getstream.chat.android.client.parser2.adapters.UpstreamReactionDtoAdapter
 import io.getstream.chat.android.client.parser2.adapters.UpstreamUserDtoAdapter
@@ -67,6 +69,8 @@ internal class MoshiChatParser(
             .add(UpstreamReactionDtoAdapter)
             .add(DownstreamUserDtoAdapter)
             .add(UpstreamUserDtoAdapter)
+            .add(DownstreamMemberDtoAdapter)
+            .add(UpstreamMemberDtoAdapter)
             .add(FlagRequestAdapterFactory)
             .build()
     }
diff --git a/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/parser2/adapters/MemberDtoAdapters.kt b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/parser2/adapters/MemberDtoAdapters.kt
new file mode 100644
index 00000000000..6b9224ba98a
--- /dev/null
+++ b/stream-chat-android-client/src/main/java/io/getstream/chat/android/client/parser2/adapters/MemberDtoAdapters.kt
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2014-2024 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.client.parser2.adapters
+
+import com.squareup.moshi.FromJson
+import com.squareup.moshi.JsonAdapter
+import com.squareup.moshi.JsonReader
+import com.squareup.moshi.JsonWriter
+import com.squareup.moshi.ToJson
+import io.getstream.chat.android.client.api2.model.dto.DownstreamMemberDto
+import io.getstream.chat.android.client.api2.model.dto.UpstreamMemberDto
+
+/**
+ * JSON adapter for [DownstreamMemberDto].
+ * Handles the proper deserialization of the [extraData] field.
+ */
+internal object DownstreamMemberDtoAdapter : CustomObjectDtoAdapter<DownstreamMemberDto>(DownstreamMemberDto::class) {
+
+    @FromJson
+    fun fromJson(
+        jsonReader: JsonReader,
+        mapAdapter: JsonAdapter<MutableMap<String, Any>>,
+        memberAdapter: JsonAdapter<DownstreamMemberDto>,
+    ): DownstreamMemberDto? = parseWithExtraData(jsonReader, mapAdapter, memberAdapter)
+
+    @ToJson
+    @Suppress("UNUSED_PARAMETER")
+    fun toJson(jsonWriter: JsonWriter, value: DownstreamMemberDto): Unit = error("Can't convert this to Json")
+}
+
+/**
+ * JSON adapter for [UpstreamMemberDto].
+ * Handles the proper serialization of the [extraData] field.
+ */
+internal object UpstreamMemberDtoAdapter : CustomObjectDtoAdapter<UpstreamMemberDto>(UpstreamMemberDto::class) {
+
+    @FromJson
+    @Suppress("UNUSED_PARAMETER")
+    fun fromJson(jsonReader: JsonReader): UpstreamMemberDto = error("Can't parse this from Json")
+
+    @ToJson
+    fun toJson(
+        jsonWriter: JsonWriter,
+        member: UpstreamMemberDto?,
+        mapAdapter: JsonAdapter<MutableMap<String, Any?>>,
+        memberAdapter: JsonAdapter<UpstreamMemberDto>,
+    ) = serializeWithExtraData(jsonWriter, member, mapAdapter, memberAdapter)
+}
diff --git a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/EventChatJsonProvider.kt b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/EventChatJsonProvider.kt
index f5f5b473267..2319365ec8c 100644
--- a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/EventChatJsonProvider.kt
+++ b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/EventChatJsonProvider.kt
@@ -633,7 +633,7 @@ private fun createMemberJsonString() =
     """
         {
             "user": ${createUserJsonString()},
-            "role": "user",
+            "channel_role": "channel_member",
             "created_at": "2020-06-29T06:14:28.000Z",
             "updated_at": "2020-06-29T06:14:28.000Z"
         }
diff --git a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/chatclient/WhenPartialUpdateMember.kt b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/chatclient/WhenPartialUpdateMember.kt
new file mode 100644
index 00000000000..1565f2b1357
--- /dev/null
+++ b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/chatclient/WhenPartialUpdateMember.kt
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2014-2024 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.client.chatclient
+
+import io.getstream.chat.android.client.ChatClient
+import io.getstream.chat.android.models.Member
+import io.getstream.chat.android.test.TestCall
+import io.getstream.chat.android.test.callFrom
+import io.getstream.result.Error
+import io.getstream.result.Result
+import io.getstream.result.call.Call
+import kotlinx.coroutines.test.runTest
+import org.amshove.kluent.shouldBeInstanceOf
+import org.junit.jupiter.api.Test
+import org.mockito.kotlin.any
+import org.mockito.kotlin.doReturn
+import org.mockito.kotlin.mock
+import org.mockito.kotlin.whenever
+
+internal class WhenPartialUpdateMember : BaseChatClientTest() {
+
+    @Test
+    fun `Given partialUpdateMember api call successful ChatClient should return success result`() = runTest {
+        val apiResult = callFrom { mock<Member>() }
+        val sut = Fixture().givenPartialUpdateMemberApiResult(apiResult).get()
+
+        val result = sut.partialUpdateMember("channelType", "channelId", "userId").await()
+
+        result shouldBeInstanceOf Result.Success::class
+    }
+
+    @Test
+    fun `Given partialUpdateMember api call fails ChatClient should return error result`() = runTest {
+        val apiResult = TestCall<Member>(Result.Failure(Error.GenericError("Error")))
+        val sut = Fixture().givenPartialUpdateMemberApiResult(apiResult).get()
+
+        val result = sut.partialUpdateMember("channelType", "channelId", "userId").await()
+
+        result shouldBeInstanceOf Result.Failure::class
+    }
+
+    private inner class Fixture {
+
+        fun givenPartialUpdateMemberApiResult(result: Call<Member>) = apply {
+            whenever(api.partialUpdateMember(any(), any(), any(), any(), any())) doReturn result
+        }
+
+        fun get(): ChatClient = chatClient
+    }
+}
diff --git a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser/EventArguments.kt b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser/EventArguments.kt
index 424f6991975..8cd3605287c 100644
--- a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser/EventArguments.kt
+++ b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser/EventArguments.kt
@@ -151,6 +151,7 @@ internal object EventArguments {
 
     private val member = Member(
         user,
+        channelRole = "channel_member",
         createdAt = date,
         updatedAt = date,
     )
diff --git a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/DownstreamMemberDtoAdapterTest.kt b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/DownstreamMemberDtoAdapterTest.kt
new file mode 100644
index 00000000000..8aa36b9269b
--- /dev/null
+++ b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/DownstreamMemberDtoAdapterTest.kt
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2014-2024 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.client.parser2
+
+import io.getstream.chat.android.client.api2.model.dto.DownstreamMemberDto
+import io.getstream.chat.android.client.parser2.testdata.MemberDtoTestData
+import org.amshove.kluent.shouldBeEqualTo
+import org.junit.jupiter.api.Test
+
+internal class DownstreamMemberDtoAdapterTest {
+
+    private val parser = MoshiChatParser { "" }
+
+    @Test
+    fun `Deserialize JSON member with custom data`() {
+        val member = parser.fromJson(MemberDtoTestData.downstreamJsonWithExtraData, DownstreamMemberDto::class.java)
+        member shouldBeEqualTo MemberDtoTestData.downstreamMemberWithExtraData
+    }
+
+    @Test
+    fun `Deserialize JSON member without custom data`() {
+        val member = parser.fromJson(MemberDtoTestData.downstreamJsonWithoutExtraData, DownstreamMemberDto::class.java)
+        member shouldBeEqualTo MemberDtoTestData.downstreamMemberWithoutExtraData
+    }
+}
diff --git a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/UpstreamMemberDtoAdapterTest.kt b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/UpstreamMemberDtoAdapterTest.kt
new file mode 100644
index 00000000000..18395a473bb
--- /dev/null
+++ b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/UpstreamMemberDtoAdapterTest.kt
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2014-2024 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.client.parser2
+
+import io.getstream.chat.android.client.parser2.testdata.MemberDtoTestData
+import org.amshove.kluent.shouldBeEqualTo
+import org.junit.jupiter.api.Test
+
+internal class UpstreamMemberDtoAdapterTest {
+
+    private val parser = MoshiChatParser { "" }
+
+    @Test
+    fun `Serialize JSON member with custom data`() {
+        val json = parser.toJson(MemberDtoTestData.upstreamMemberWithExtraData)
+        json shouldBeEqualTo MemberDtoTestData.upstreamJsonWithExtraData
+    }
+
+    @Test
+    fun `Serialize JSON member without custom data`() {
+        val json = parser.toJson(MemberDtoTestData.upstreamMemberWithoutExtraData)
+        json shouldBeEqualTo MemberDtoTestData.upstreamJsonWithoutExtraData
+    }
+}
diff --git a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/testdata/ChannelDtoTestData.kt b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/testdata/ChannelDtoTestData.kt
index 9d23c43080f..56860ab353f 100644
--- a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/testdata/ChannelDtoTestData.kt
+++ b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/testdata/ChannelDtoTestData.kt
@@ -116,7 +116,6 @@ internal object ChannelDtoTestData {
           "members": [
            {
             "user": ${UserDtoTestData.downstreamJson},
-            "role": "owner",
             "created_at": "2020-06-10T11:04:31.0Z",
             "updated_at": "2020-06-10T11:04:31.588Z",
             "invited": true,
@@ -147,7 +146,6 @@ internal object ChannelDtoTestData {
           "own_capabilities": ["connect-events", "pin-message"],
           "membership": {
             "user": ${UserDtoTestData.downstreamJson},
-            "role": "owner",
             "created_at": "2020-06-10T11:04:31.0Z",
             "updated_at": "2020-06-10T11:04:31.588Z",
             "invited": true,
@@ -188,6 +186,7 @@ internal object ChannelDtoTestData {
                 notifications_muted = false,
                 status = "member",
                 ban_expires = Date(1615218151355),
+                extraData = emptyMap(),
             ),
         ),
         watchers = listOf(UserDtoTestData.downstreamUser),
@@ -218,6 +217,7 @@ internal object ChannelDtoTestData {
             notifications_muted = false,
             status = "member",
             ban_expires = null,
+            extraData = emptyMap(),
         ),
         extraData = mapOf("draft" to true),
     )
@@ -373,6 +373,7 @@ internal object ChannelDtoTestData {
                 notifications_muted = false,
                 status = "member",
                 ban_expires = Date(1615218151355),
+                extraData = emptyMap(),
             ),
         ),
         watchers = listOf(UserDtoTestData.upstreamUser),
diff --git a/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/testdata/MemberDtoTestData.kt b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/testdata/MemberDtoTestData.kt
new file mode 100644
index 00000000000..c11fe2283d8
--- /dev/null
+++ b/stream-chat-android-client/src/test/java/io/getstream/chat/android/client/parser2/testdata/MemberDtoTestData.kt
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2014-2024 Stream.io Inc. All rights reserved.
+ *
+ * Licensed under the Stream License;
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://github.com/GetStream/stream-chat-android/blob/main/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.getstream.chat.android.client.parser2.testdata
+
+import io.getstream.chat.android.client.api2.model.dto.DownstreamMemberDto
+import io.getstream.chat.android.client.api2.model.dto.UpstreamMemberDto
+import org.intellij.lang.annotations.Language
+
+internal object MemberDtoTestData {
+
+    @Language("JSON")
+    val downstreamJsonWithExtraData = """
+        {
+        "user" : ${UserDtoTestData.downstreamJson},
+        "shadow_banned" : false,
+        "banned" : false,
+        "is_premium" : true
+        }""".withoutWhitespace()
+
+    @Language("JSON")
+    val downstreamJsonWithoutExtraData = """
+        {
+        "user" : ${UserDtoTestData.downstreamJson},
+        "shadow_banned" : false,
+        "banned" : false
+        }""".withoutWhitespace()
+
+    @Language("JSON")
+    val upstreamJsonWithExtraData = """
+        {
+        "user" : ${UserDtoTestData.upstreamJson},
+        "shadow_banned" : false,
+        "banned" : false,
+        "is_premium" : true
+        }""".withoutWhitespace()
+
+    @Language("JSON")
+    val upstreamJsonWithoutExtraData = """
+        {
+        "user" : ${UserDtoTestData.upstreamJson},
+        "shadow_banned" : false,
+        "banned" : false
+        }""".withoutWhitespace()
+
+    val downstreamMemberWithExtraData = DownstreamMemberDto(
+        user = UserDtoTestData.downstreamUser,
+        created_at = null,
+        updated_at = null,
+        invited = null,
+        invite_accepted_at = null,
+        invite_rejected_at = null,
+        shadow_banned = false,
+        banned = false,
+        channel_role = null,
+        notifications_muted = null,
+        status = null,
+        ban_expires = null,
+        extraData = mapOf("is_premium" to true),
+    )
+
+    val downstreamMemberWithoutExtraData = DownstreamMemberDto(
+        user = UserDtoTestData.downstreamUser,
+        created_at = null,
+        updated_at = null,
+        invited = null,
+        invite_accepted_at = null,
+        invite_rejected_at = null,
+        shadow_banned = false,
+        banned = false,
+        channel_role = null,
+        notifications_muted = null,
+        status = null,
+        ban_expires = null,
+        extraData = emptyMap(),
+    )
+
+    val upstreamMemberWithExtraData = UpstreamMemberDto(
+        user = UserDtoTestData.upstreamUser,
+        created_at = null,
+        updated_at = null,
+        invited = null,
+        invite_accepted_at = null,
+        invite_rejected_at = null,
+        shadow_banned = false,
+        banned = false,
+        channel_role = null,
+        notifications_muted = null,
+        status = null,
+        ban_expires = null,
+        extraData = mapOf("is_premium" to true),
+    )
+
+    val upstreamMemberWithoutExtraData = UpstreamMemberDto(
+        user = UserDtoTestData.upstreamUser,
+        created_at = null,
+        updated_at = null,
+        invited = null,
+        invite_accepted_at = null,
+        invite_rejected_at = null,
+        shadow_banned = false,
+        banned = false,
+        channel_role = null,
+        notifications_muted = null,
+        status = null,
+        ban_expires = null,
+        extraData = emptyMap(),
+    )
+}
diff --git a/stream-chat-android-core/api/stream-chat-android-core.api b/stream-chat-android-core/api/stream-chat-android-core.api
index cf90c925de9..9b733350aac 100644
--- a/stream-chat-android-core/api/stream-chat-android-core.api
+++ b/stream-chat-android-core/api/stream-chat-android-core.api
@@ -1036,13 +1036,14 @@ public final class io/getstream/chat/android/models/LinkPreview$Companion {
 	public final fun getEMPTY ()Lio/getstream/chat/android/models/LinkPreview;
 }
 
-public final class io/getstream/chat/android/models/Member : io/getstream/chat/android/models/UserEntity, io/getstream/chat/android/models/querysort/ComparableFieldProvider {
-	public fun <init> (Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;)V
-	public synthetic fun <init> (Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+public final class io/getstream/chat/android/models/Member : io/getstream/chat/android/models/CustomObject, io/getstream/chat/android/models/UserEntity, io/getstream/chat/android/models/querysort/ComparableFieldProvider {
+	public fun <init> (Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;Ljava/util/Map;)V
+	public synthetic fun <init> (Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;Ljava/util/Map;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public final fun component1 ()Lio/getstream/chat/android/models/User;
 	public final fun component10 ()Ljava/lang/Boolean;
 	public final fun component11 ()Ljava/lang/String;
 	public final fun component12 ()Ljava/util/Date;
+	public final fun component13 ()Ljava/util/Map;
 	public final fun component2 ()Ljava/util/Date;
 	public final fun component3 ()Ljava/util/Date;
 	public final fun component4 ()Ljava/lang/Boolean;
@@ -1051,14 +1052,16 @@ public final class io/getstream/chat/android/models/Member : io/getstream/chat/a
 	public final fun component7 ()Z
 	public final fun component8 ()Z
 	public final fun component9 ()Ljava/lang/String;
-	public final fun copy (Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;)Lio/getstream/chat/android/models/Member;
-	public static synthetic fun copy$default (Lio/getstream/chat/android/models/Member;Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;ILjava/lang/Object;)Lio/getstream/chat/android/models/Member;
+	public final fun copy (Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;Ljava/util/Map;)Lio/getstream/chat/android/models/Member;
+	public static synthetic fun copy$default (Lio/getstream/chat/android/models/Member;Lio/getstream/chat/android/models/User;Ljava/util/Date;Ljava/util/Date;Ljava/lang/Boolean;Ljava/util/Date;Ljava/util/Date;ZZLjava/lang/String;Ljava/lang/Boolean;Ljava/lang/String;Ljava/util/Date;Ljava/util/Map;ILjava/lang/Object;)Lio/getstream/chat/android/models/Member;
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getBanExpires ()Ljava/util/Date;
 	public final fun getBanned ()Z
 	public final fun getChannelRole ()Ljava/lang/String;
 	public fun getComparableField (Ljava/lang/String;)Ljava/lang/Comparable;
 	public final fun getCreatedAt ()Ljava/util/Date;
+	public fun getExtraData ()Ljava/util/Map;
+	public fun getExtraValue (Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;
 	public final fun getInviteAcceptedAt ()Ljava/util/Date;
 	public final fun getInviteRejectedAt ()Ljava/util/Date;
 	public final fun getNotificationsMuted ()Ljava/lang/Boolean;
diff --git a/stream-chat-android-core/src/main/java/io/getstream/chat/android/models/Member.kt b/stream-chat-android-core/src/main/java/io/getstream/chat/android/models/Member.kt
index 178acada904..334d537424e 100644
--- a/stream-chat-android-core/src/main/java/io/getstream/chat/android/models/Member.kt
+++ b/stream-chat-android-core/src/main/java/io/getstream/chat/android/models/Member.kt
@@ -81,7 +81,11 @@ public data class Member(
      * The date the ban expires.
      */
     val banExpires: Date? = null,
-) : UserEntity, ComparableFieldProvider {
+    /**
+     * A map of custom fields for the member.
+     */
+    override val extraData: Map<String, Any> = emptyMap(),
+) : UserEntity, CustomObject, ComparableFieldProvider {
 
     override fun getComparableField(fieldName: String): Comparable<*>? {
         return when (fieldName) {
diff --git a/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/database/internal/ChatDatabase.kt b/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/database/internal/ChatDatabase.kt
index 73301f43c4c..16cc821f675 100644
--- a/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/database/internal/ChatDatabase.kt
+++ b/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/database/internal/ChatDatabase.kt
@@ -81,7 +81,7 @@ import io.getstream.chat.android.offline.repository.domain.user.internal.UserEnt
         ThreadEntity::class,
         ThreadOrderEntity::class,
     ],
-    version = 79,
+    version = 80,
     exportSchema = false,
 )
 @TypeConverters(
diff --git a/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberEntity.kt b/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberEntity.kt
index 594d20cc553..e50f6c22c4d 100644
--- a/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberEntity.kt
+++ b/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberEntity.kt
@@ -59,4 +59,7 @@ internal data class MemberEntity(
 
     /** The date the ban expires. */
     var banExpires: Date? = null,
+
+    /** Map of custom fields for the member. */
+    val extraData: Map<String, Any> = emptyMap(),
 )
diff --git a/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberMapper.kt b/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberMapper.kt
index 1382ae5ddf7..86512e8fca2 100644
--- a/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberMapper.kt
+++ b/stream-chat-android-offline/src/main/java/io/getstream/chat/android/offline/repository/domain/channel/member/internal/MemberMapper.kt
@@ -32,6 +32,7 @@ internal fun Member.toEntity(): MemberEntity = MemberEntity(
     notificationsMuted = notificationsMuted,
     status = status,
     banExpires = banExpires,
+    extraData = extraData,
 )
 
 internal suspend fun MemberEntity.toModel(getUser: suspend (userId: String) -> User): Member = Member(
@@ -47,4 +48,5 @@ internal suspend fun MemberEntity.toModel(getUser: suspend (userId: String) -> U
     notificationsMuted = notificationsMuted,
     status = status,
     banExpires = banExpires,
+    extraData = extraData,
 )