diff --git a/litellm/llms/bedrock/chat/converse_transformation.py b/litellm/llms/bedrock/chat/converse_transformation.py
index c124f1c7d8..b93ca94bed 100644
--- a/litellm/llms/bedrock/chat/converse_transformation.py
+++ b/litellm/llms/bedrock/chat/converse_transformation.py
@@ -25,6 +25,7 @@ from litellm.llms.base_llm.chat.transformation import BaseConfig, BaseLLMExcepti
 from litellm.types.llms.bedrock import *
 from litellm.types.llms.openai import (
     AllMessageValues,
+    ChatCompletionAssistantMessage,
     ChatCompletionRedactedThinkingBlock,
     ChatCompletionResponseMessage,
     ChatCompletionSystemMessage,
@@ -505,6 +506,7 @@ class AmazonConverseConfig(BaseConfig):
             OpenAIMessageContentListBlock,
             ChatCompletionUserMessage,
             ChatCompletionSystemMessage,
+            ChatCompletionAssistantMessage,
         ],
         block_type: Literal["system"],
     ) -> Optional[SystemContentBlock]:
@@ -517,6 +519,7 @@ class AmazonConverseConfig(BaseConfig):
             OpenAIMessageContentListBlock,
             ChatCompletionUserMessage,
             ChatCompletionSystemMessage,
+            ChatCompletionAssistantMessage,
         ],
         block_type: Literal["content_block"],
     ) -> Optional[ContentBlock]:
@@ -528,6 +531,7 @@ class AmazonConverseConfig(BaseConfig):
             OpenAIMessageContentListBlock,
             ChatCompletionUserMessage,
             ChatCompletionSystemMessage,
+            ChatCompletionAssistantMessage,
         ],
         block_type: Literal["system", "content_block"],
     ) -> Optional[Union[SystemContentBlock, ContentBlock]]: