diff --git a/.changeset/happy-starfishes-trade.md b/.changeset/happy-starfishes-trade.md
new file mode 100644
index 0000000000..48ceaecfa5
--- /dev/null
+++ b/.changeset/happy-starfishes-trade.md
@@ -0,0 +1,5 @@
+---
+'@aws-amplify/ai-constructs': patch
+---
+
+Do not bundle AWS SDK if default implementation is used
diff --git a/packages/ai-constructs/src/conversation/conversation_handler_construct.ts b/packages/ai-constructs/src/conversation/conversation_handler_construct.ts
index 4f74591170..57b33f779f 100644
--- a/packages/ai-constructs/src/conversation/conversation_handler_construct.ts
+++ b/packages/ai-constructs/src/conversation/conversation_handler_construct.ts
@@ -62,7 +62,10 @@ export class ConversationHandlerFunction
         entry: this.props.entry ?? defaultHandlerFilePath,
         handler: 'handler',
         bundling: {
-          bundleAwsSDK: true,
+          // Do not bundle SDK if conversation handler is using our default implementation which is
+          // compatible with Lambda provided SDK.
+          // For custom entry we do bundle SDK as we can't control version customer is coding against.
+          bundleAwsSDK: !!this.props.entry,
         },
         logGroup: new LogGroup(this, 'conversationHandlerFunctionLogGroup', {
           retention: RetentionDays.INFINITE,