diff --git a/Assets/AppsFlyer/AppsFlyerPurchaseConnector.cs b/Assets/AppsFlyer/AppsFlyerPurchaseConnector.cs
index b9c42d2..7b9e260 100644
--- a/Assets/AppsFlyer/AppsFlyerPurchaseConnector.cs
+++ b/Assets/AppsFlyer/AppsFlyerPurchaseConnector.cs
@@ -8,7 +8,7 @@ namespace AppsFlyerConnector
     
     public class AppsFlyerPurchaseConnector : MonoBehaviour {
 
-        public static readonly string kAppsFlyerPurchaseConnectorVersion = "2.1.0";
+        public static readonly string kAppsFlyerPurchaseConnectorVersion = "2.1.1";
 
 #if UNITY_ANDROID && !UNITY_EDITOR
         private static AndroidJavaClass appsFlyerAndroidConnector = new AndroidJavaClass("com.appsflyer.unity.afunitypurchaseconnector.AppsFlyerAndroidWrapper");
diff --git a/Assets/AppsFlyer/Editor/AppsFlyerPurchaseConnectorDependencies.xml b/Assets/AppsFlyer/Editor/AppsFlyerPurchaseConnectorDependencies.xml
index 70c2737..748f2ae 100644
--- a/Assets/AppsFlyer/Editor/AppsFlyerPurchaseConnectorDependencies.xml
+++ b/Assets/AppsFlyer/Editor/AppsFlyerPurchaseConnectorDependencies.xml
@@ -7,7 +7,7 @@
   </androidPackages>
 
   <iosPods>
-    <iosPod name="PurchaseConnector" version="6.15.2" minTargetSdk="12.0">
+    <iosPod name="PurchaseConnector" version="6.15.3" minTargetSdk="12.0">
     </iosPod>
   </iosPods>
 
diff --git a/Assets/AppsFlyer/ProductPurchase.cs b/Assets/AppsFlyer/ProductPurchase.cs
index 50b2585..f2d92ef 100644
--- a/Assets/AppsFlyer/ProductPurchase.cs
+++ b/Assets/AppsFlyer/ProductPurchase.cs
@@ -1,3 +1,5 @@
+#nullable enable
+
 using System.Collections;
 using System.Collections.Generic;
 using System;
@@ -9,33 +11,33 @@ class InAppPurchaseValidationResult : EventArgs
     public bool success;
     public ProductPurchase? productPurchase;
     public ValidationFailureData? failureData;
-    public string token;
+    public string? token;
 }
 
 [System.Serializable]
 class ProductPurchase
 {
-    public string kind;
-    public string purchaseTimeMillis;
+    public string? kind;
+    public string? purchaseTimeMillis;
     public int purchaseState;
     public int consumptionState;
-    public string developerPayload;
-    public string orderId;
+    public string? developerPayload;
+    public string? orderId;
     public int purchaseType;
     public int acknowledgementState;
-    public string purchaseToken;
-    public string productId;
+    public string? purchaseToken;
+    public string? productId;
     public int quantity;
-    public string obfuscatedExternalAccountId;
-    public string obfuscatedExternalProfil;
-    public string regionCode;
+    public string? obfuscatedExternalAccountId;
+    public string? obfuscatedExternalProfil;
+    public string? regionCode;
 }
 
 [System.Serializable]
 class ValidationFailureData
 {
     public int status;
-    public string description;
+    public string? description;
 }
 
 [System.Serializable]
@@ -44,24 +46,24 @@ class SubscriptionValidationResult
     public bool success;
     public SubscriptionPurchase? subscriptionPurchase;
     public ValidationFailureData? failureData;
-    public string token;
+    public string? token;
 }
 
 [System.Serializable]
 class SubscriptionPurchase
 {
-    public string acknowledgementState;
+    public string? acknowledgementState;
     public CanceledStateContext? canceledStateContext;
     public ExternalAccountIdentifiers? externalAccountIdentifiers;
-    public string kind;
-    public string latestOrderId;
-    public List<SubscriptionPurchaseLineItem> lineItems;
+    public string? kind;
+    public string? latestOrderId;
+    public List<SubscriptionPurchaseLineItem>? lineItems;
     public string? linkedPurchaseToken;
     public PausedStateContext? pausedStateContext;
-    public string regionCode;
-    public string startTime;
+    public string? regionCode;
+    public string? startTime;
     public SubscribeWithGoogleInfo? subscribeWithGoogleInfo;
-    public string subscriptionState;
+    public string? subscriptionState;
     public TestPurchase? testPurchase;
 }
 
@@ -78,9 +80,9 @@ class CanceledStateContext
 [System.Serializable]
 class ExternalAccountIdentifiers
 {
-    public string externalAccountId;
-    public string obfuscatedExternalAccountId;
-    public string obfuscatedExternalProfileId;
+    public string? externalAccountId;
+    public string? obfuscatedExternalAccountId;
+    public string? obfuscatedExternalProfileId;
 }
 
 [System.Serializable]
@@ -88,26 +90,26 @@ class SubscriptionPurchaseLineItem
 {
     public AutoRenewingPlan? autoRenewingPlan;
     public DeferredItemReplacement? deferredItemReplacement;
-    public string expiryTime;
+    public string? expiryTime;
     public OfferDetails? offerDetails;
     public PrepaidPlan? prepaidPlan;
-    public string productId;
+    public string? productId;
 }
 
 [System.Serializable]
 class PausedStateContext
 {
-    public string autoResumeTime;
+    public string? autoResumeTime;
 }
 
 [System.Serializable]
 class SubscribeWithGoogleInfo
 {
-    public string emailAddress;
-    public string familyName;
-    public string givenName;
-    public string profileId;
-    public string profileName;
+    public string? emailAddress;
+    public string? familyName;
+    public string? givenName;
+    public string? profileId;
+    public string? profileName;
 }
 
 [System.Serializable]
@@ -126,7 +128,7 @@ class SystemInitiatedCancellation{}
 class UserInitiatedCancellation
 {
     public CancelSurveyResult? cancelSurveyResult;
-    public string cancelTime;
+    public string? cancelTime;
 }
 
 [System.Serializable]
@@ -139,14 +141,14 @@ class AutoRenewingPlan
 [System.Serializable]
 class DeferredItemReplacement
 {
-    public string productId;
+    public string? productId;
 }
 
 [System.Serializable]
 class OfferDetails
 {
     public List<string>? offerTags;
-    public string basePlanId;
+    public string? basePlanId;
     public string? offerId;
 }
 
@@ -159,23 +161,23 @@ class PrepaidPlan
 [System.Serializable]
 class CancelSurveyResult
 {
-    public string reason;
-    public string reasonUserInput;
+    public string? reason;
+    public string? reasonUserInput;
 }
 
 [System.Serializable]
 class SubscriptionItemPriceChangeDetails
 {
-    public string expectedNewPriceChargeTime;
+    public string? expectedNewPriceChargeTime;
     public Money? newPrice;
-    public string priceChangeMode;
-    public string priceChangeState;
+    public string? priceChangeMode;
+    public string? priceChangeState;
 }
 
 [System.Serializable]
  class Money
  {
-    public string currencyCode;
+    public string? currencyCode;
     public long nanos;
     public long units;
  }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4464d93..7758599 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 # Versions
+## v2.1.1
+* Update iOS PurchaseConnector to 6.15.3
+* Warnings fix
+
 ## v2.1.0
 * Update Android PurchaseConnector to 2.1.0
 
diff --git a/appsflyer-unity-purchase-connector-2.1.0.unitypackage b/appsflyer-unity-purchase-connector-2.1.0.unitypackage
deleted file mode 100644
index 5222f3b..0000000
Binary files a/appsflyer-unity-purchase-connector-2.1.0.unitypackage and /dev/null differ
diff --git a/appsflyer-unity-purchase-connector-2.1.1.unitypackage b/appsflyer-unity-purchase-connector-2.1.1.unitypackage
new file mode 100644
index 0000000..d56f640
Binary files /dev/null and b/appsflyer-unity-purchase-connector-2.1.1.unitypackage differ
diff --git a/deploy/build_appsflyer_unity_purchase-connector_plugin.sh b/deploy/build_appsflyer_unity_purchase-connector_plugin.sh
index c18fe80..cd8f61e 100644
--- a/deploy/build_appsflyer_unity_purchase-connector_plugin.sh
+++ b/deploy/build_appsflyer_unity_purchase-connector_plugin.sh
@@ -4,7 +4,7 @@ echo "Start build for appsflyer-unity-purchase-connector.unitypackage"
 
 DEPLOY_PATH=output
 UNITY_PATH="/Applications/Unity/Unity.app/Contents/MacOS/Unity"
-PACKAGE_NAME="appsflyer-unity-purchase-connector-2.1.0.unitypackage"
+PACKAGE_NAME="appsflyer-unity-purchase-connector-2.1.1.unitypackage"
 mkdir -p $DEPLOY_PATH
 
 #move external dependency manager
@@ -23,7 +23,7 @@ mv external-dependency-manager-1.2.144.unitypackage ..
 Assets \
 $PWD/$DEPLOY_PATH/$PACKAGE_NAME \
 -quit \
-&& echo "Package exported successfully to output/appsflyer-unity-purchase-connector-2.1.0.unitypackage" \
+&& echo "Package exported successfully to output/appsflyer-unity-purchase-connector-2.1.1.unitypackage" \
 || echo "Failed to export package. See create_unity_core.log for more info"
 
 if [ "$1" == "-p" ]; then
diff --git a/deploy/build_appsflyer_unity_purchase-connector_plugin_strict_mode.sh b/deploy/build_appsflyer_unity_purchase-connector_plugin_strict_mode.sh
index 011e948..eb4fa6b 100644
--- a/deploy/build_appsflyer_unity_purchase-connector_plugin_strict_mode.sh
+++ b/deploy/build_appsflyer_unity_purchase-connector_plugin_strict_mode.sh
@@ -4,7 +4,7 @@ echo "Start build for appsflyer-unity-purchase-connector.unitypackage - Strict M
 
 DEPLOY_PATH=output
 UNITY_PATH="/Applications/Unity/Unity.app/Contents/MacOS/Unity"
-PACKAGE_NAME="appsflyer-unity-purchase-connector-strict-mode-2.1.0.unitypackage"
+PACKAGE_NAME="appsflyer-unity-purchase-connector-strict-mode-2.1.1.unitypackage"
 mkdir -p $DEPLOY_PATH
 
 #move external dependency manager
@@ -27,7 +27,7 @@ echo "Changing PurchaseConnector to Strict Mode. Done."
 Assets \
 $PWD/$DEPLOY_PATH/$PACKAGE_NAME \
 -quit \
-&& echo "Package exported successfully to output/appsflyer-unity-purchase-connector-strict-mode-2.1.0.unitypackage" \
+&& echo "Package exported successfully to output/appsflyer-unity-purchase-connector-strict-mode-2.1.1.unitypackage" \
 || echo "Failed to export package. See create_unity_core.log for more info"
 
 if [ "$1" == "-p" ]; then
diff --git a/strict-mode/appsflyer-unity-purchase-connector-strict-mode-2.1.0.unitypackage b/strict-mode/appsflyer-unity-purchase-connector-strict-mode-2.1.0.unitypackage
deleted file mode 100644
index 68aac57..0000000
Binary files a/strict-mode/appsflyer-unity-purchase-connector-strict-mode-2.1.0.unitypackage and /dev/null differ
diff --git a/strict-mode/appsflyer-unity-purchase-connector-strict-mode-2.1.1.unitypackage b/strict-mode/appsflyer-unity-purchase-connector-strict-mode-2.1.1.unitypackage
new file mode 100644
index 0000000..93c575b
Binary files /dev/null and b/strict-mode/appsflyer-unity-purchase-connector-strict-mode-2.1.1.unitypackage differ