diff --git a/metagpt/provider/bedrock/amazon_bedrock_api.py b/metagpt/provider/bedrock/amazon_bedrock_api.py
index 640be3534..184e934fa 100644
--- a/metagpt/provider/bedrock/amazon_bedrock_api.py
+++ b/metagpt/provider/bedrock/amazon_bedrock_api.py
@@ -6,7 +6,11 @@ from metagpt.provider.base_llm import BaseLLM
 from metagpt.logs import log_llm_stream, logger
 from metagpt.provider.bedrock.bedrock_provider import get_provider
 from metagpt.provider.bedrock.utils import NOT_SUUPORT_STREAM_MODELS, get_max_tokens
-import boto3
+try:
+    import boto3
+except ImportError:
+    raise ImportError(
+        "boto3 not found! please install it by `pip install boto3` first ")
 
 
 @register_provider([LLMType.AMAZON_BEDROCK])
@@ -97,7 +101,7 @@ class AmazonBedrockLLM(BaseLLM):
         return full_text
 
     # boto3 don't support support asynchronous calls.
-    # for asynchronous version of boto3,check out:
+    # for asynchronous version of boto3, check out:
     # https://aioboto3.readthedocs.io/en/latest/usage.html
     # However,aioboto3 doesn't support invoke model
 
diff --git a/metagpt/provider/bedrock/bedrock_provider.py b/metagpt/provider/bedrock/bedrock_provider.py
index 850b57c4f..375657f12 100644
--- a/metagpt/provider/bedrock/bedrock_provider.py
+++ b/metagpt/provider/bedrock/bedrock_provider.py
@@ -16,6 +16,7 @@ class MistralProvider(BaseBedrockProvider):
 
 class AnthropicProvider(BaseBedrockProvider):
     # See https://docs.aws.amazon.com/bedrock/latest/userguide/model-parameters-anthropic-claude-messages.html
+
     def messages_to_prompt(self, messages: list[dict]) -> str:
         return messages_to_prompt_claude(messages)
 
@@ -37,6 +38,7 @@ class CohereProvider(BaseBedrockProvider):
 
 class MetaProvider(BaseBedrockProvider):
     # See https://docs.aws.amazon.com/bedrock/latest/userguide/model-parameters-meta.html
+
     max_tokens_field_name = "max_gen_len"
 
     def __init__(self, llama_version: Literal["llama2", "llama3"]) -> None:
@@ -54,6 +56,7 @@ class MetaProvider(BaseBedrockProvider):
 
 class Ai21Provider(BaseBedrockProvider):
     # See https://docs.aws.amazon.com/bedrock/latest/userguide/model-parameters-jurassic2.html
+
     max_tokens_field_name = "maxTokens"
 
     def _get_completion_from_dict(self, rsp_dict: dict) -> str:
@@ -62,6 +65,7 @@ class Ai21Provider(BaseBedrockProvider):
 
 class AmazonProvider(BaseBedrockProvider):
     # See https://docs.aws.amazon.com/bedrock/latest/userguide/model-parameters-titan-text.html
+
     max_tokens_field_name = "maxTokenCount"
 
     def get_request_body(self, messages: list[dict], **generate_kwargs):