diff --git a/libs/aws/langchain_aws/llms/bedrock.py b/libs/aws/langchain_aws/llms/bedrock.py
index befb4c51..5b825bc8 100644
--- a/libs/aws/langchain_aws/llms/bedrock.py
+++ b/libs/aws/langchain_aws/llms/bedrock.py
@@ -802,7 +802,7 @@ def _prepare_input_and_invoke(
                 max_tokens=self.max_tokens,
                 temperature=self.temperature,
             )
-        body = json.dumps(input_body)
+        body = json.dumps(input_body, default=str)
         accept = "application/json"
         contentType = "application/json"
 
@@ -939,7 +939,7 @@ def _prepare_input_and_invoke_stream(
                     max_tokens=self.max_tokens,
                     temperature=self.temperature,
                 )
-        body = json.dumps(input_body)
+        body = json.dumps(input_body, default=str)
 
         request_options = {
             "body": body,
@@ -1024,7 +1024,7 @@ async def _aprepare_input_and_invoke_stream(
                 max_tokens=self.max_tokens,
                 temperature=self.temperature,
             )
-        body = json.dumps(input_body)
+        body = json.dumps(input_body, default=str)
 
         response = await asyncio.get_running_loop().run_in_executor(
             None,