diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00db369..f05ddba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 2.2.3.0 (2025-09-15)
+* [#156](https://github.com/MercuryTechnologies/slack-web/pull/156)
+  Implement `message_deleted` event.
+
 # 2.2.2.0 (2025-09-15)
 * [#153](https://github.com/MercuryTechnologies/slack-web/pull/153)
   Implement `channel_shared` and `channel_unshared` events.
diff --git a/src/Web/Slack/Experimental/Events/Types.hs b/src/Web/Slack/Experimental/Events/Types.hs
index 47794f8..9cdc6fd 100644
--- a/src/Web/Slack/Experimental/Events/Types.hs
+++ b/src/Web/Slack/Experimental/Events/Types.hs
@@ -244,6 +244,20 @@ data MessageUpdateEvent = MessageUpdateEvent
 
 $(deriveFromJSON snakeCaseOptions ''MessageUpdateEvent)
 
+-- | A message was deleted from a channel or DM.
+--
+-- <https://docs.slack.dev/reference/events/message/message_deleted/>
+--
+-- @since 2.2.3.0
+data MessageDeletedEvent = MessageDeletedEvent
+  { channel :: ConversationId
+  , ts :: Text
+  , deletedTs :: Text
+  }
+  deriving stock (Show)
+
+$(deriveFromJSON snakeCaseOptions ''MessageDeletedEvent)
+
 -- | FIXME: this might be a Channel, but may also be missing some fields/have bonus
 -- because Slack is cursed.
 data CreatedChannel = CreatedChannel
@@ -286,6 +300,8 @@ $(deriveFromJSON snakeCaseOptions ''ChannelLeftEvent)
 -- | A channel has been shared with an external workspace.
 --
 -- <https://docs.slack.dev/reference/events/channel_shared/>
+--
+-- @since 2.2.2.0
 data ChannelSharedEvent = ChannelSharedEvent
   { connectedTeamId :: TeamId
   , channel :: ConversationId
@@ -298,6 +314,8 @@ $(deriveFromJSON snakeCaseOptions ''ChannelSharedEvent)
 -- | A channel has been unshared with an external workspace.
 --
 -- <https://docs.slack.dev/reference/events/channel_unshared/>
+--
+-- @since 2.2.2.0
 data ChannelUnsharedEvent = ChannelUnsharedEvent
   { previouslyConnectedTeamId :: TeamId
   , channel :: ConversationId
@@ -364,6 +382,8 @@ data Event
   = EventMessage MessageEvent
   | EventBotMessage BotMessageEvent
   | EventMessageChanged
+  | -- | @since 2.2.3.0
+    EventMessageDeleted MessageDeletedEvent
   | -- | Weird message event of subtype channel_join. Sent "sometimes", according
     -- to a random Slack blog post from 2017:
     -- <https://api.slack.com/changelog/2017-05-rethinking-channel-entrance-and-exit-events-and-messages>
@@ -372,8 +392,10 @@ data Event
     EventChannelJoinMessage
   | EventChannelCreated ChannelCreatedEvent
   | EventChannelLeft ChannelLeftEvent
-  | EventChannelShared ChannelSharedEvent
-  | EventChannelUnshared ChannelUnsharedEvent
+  | -- | @since 2.2.2.0
+    EventChannelShared ChannelSharedEvent
+  | -- | @since 2.2.2.0
+    EventChannelUnshared ChannelUnsharedEvent
   | -- | @since 2.1.0.0
     EventAppHomeOpened AppHomeOpenedEvent
   | EventUnknown Value
@@ -387,6 +409,7 @@ instance FromJSON Event where
       ("message", Nothing) -> EventMessage <$> parseJSON @MessageEvent (Object obj)
       ("message", Just "bot_message") -> EventBotMessage <$> parseJSON @BotMessageEvent (Object obj)
       ("message", Just "message_changed") -> pure EventMessageChanged
+      ("message", Just "message_deleted") -> EventMessageDeleted <$> parseJSON @MessageDeletedEvent (Object obj)
       ("message", Just "channel_join") -> pure EventChannelJoinMessage
       -- n.b. these are unified since it is *identical* to a Message event with
       -- a bonus files field
diff --git a/tests/Web/Slack/Experimental/Events/TypesSpec.hs b/tests/Web/Slack/Experimental/Events/TypesSpec.hs
index 37e5dc1..262b9d3 100644
--- a/tests/Web/Slack/Experimental/Events/TypesSpec.hs
+++ b/tests/Web/Slack/Experimental/Events/TypesSpec.hs
@@ -12,6 +12,7 @@ spec = describe "Types for Slack events" do
         (oneGoldenTestDecode @SlackWebhookEvent)
         [ "messageExample"
         , "messageChange"
+        , "message_deleted"
         , "message_rich_text"
         , "message_file_share"
         , "message_file_share_slack_connect"
diff --git a/tests/golden/SlackWebhookEvent/message_deleted.golden b/tests/golden/SlackWebhookEvent/message_deleted.golden
new file mode 100644
index 0000000..de54cb8
--- /dev/null
+++ b/tests/golden/SlackWebhookEvent/message_deleted.golden
@@ -0,0 +1,20 @@
+EventEventCallback
+    ( EventCallback
+        { eventId = EventId
+            { unEventId = "Ev043QRVT9FE" }
+        , teamId = TeamId
+            { unTeamId = "T043DB835ML" }
+        , eventTime = MkSystemTime
+            { systemSeconds = 1663969383
+            , systemNanoseconds = 0
+            }
+        , event = EventMessageDeleted
+            ( MessageDeletedEvent
+                { channel = ConversationId
+                    { unConversationId = "C043YJGBY49" }
+                , ts = "1663969383.001500"
+                , deletedTs = "1663966382.046509"
+                }
+            )
+        }
+    )
diff --git a/tests/golden/SlackWebhookEvent/message_deleted.json b/tests/golden/SlackWebhookEvent/message_deleted.json
new file mode 100644
index 0000000..a166893
--- /dev/null
+++ b/tests/golden/SlackWebhookEvent/message_deleted.json
@@ -0,0 +1,37 @@
+{
+  "token": "aaaa",
+  "team_id": "T043DB835ML",
+  "api_app_id": "A0442TUPHGR",
+  "event": {
+    "type": "message",
+    "subtype": "message_deleted",
+    "hidden": true,
+    "channel": "C043YJGBY49",
+    "previous_message": {
+      "client_msg_id": "de349a9f-62a4-4293-b64d-701a1f566e8a",
+      "type": "message",
+      "text": "This message will be deleted",
+      "user": "U043H11ES4V",
+      "ts": "1663966382.046509",
+      "team": "T043DB835ML"
+    },
+    "deleted_ts": "1663966382.046509",
+    "ts": "1663969383.001500",
+    "event_ts": "1663969383.001500",
+    "channel_type": "channel"
+  },
+  "type": "event_callback",
+  "event_id": "Ev043QRVT9FE",
+  "event_time": 1663969383,
+  "authorizations": [
+    {
+      "enterprise_id": null,
+      "team_id": "T043DB835ML",
+      "user_id": "U0442US8QGH",
+      "is_bot": true,
+      "is_enterprise_install": false
+    }
+  ],
+  "is_ext_shared_channel": false,
+  "event_context": "aaaa"
+}