diff --git a/matrix_gpt/generate_clients/anthropic.py b/matrix_gpt/generate_clients/anthropic.py
index be28c10..9b81959 100644
--- a/matrix_gpt/generate_clients/anthropic.py
+++ b/matrix_gpt/generate_clients/anthropic.py
@@ -58,12 +58,11 @@ class AnthropicApiClient(ApiClient):
         })
 
     async def generate(self, command_info: CommandInfo, matrix_gpt_data: str = None):
-        print(self.context)
         r = await self._create_client(command_info.api_base).messages.create(
             model=command_info.model,
             max_tokens=None if command_info.max_tokens == 0 else command_info.max_tokens,
             temperature=command_info.temperature,
-            system='' if not command_info.system_prompt else command_info.system_prompt,
+            system=None if not command_info.system_prompt else command_info.system_prompt,
             messages=self.context
         )
         return r.content[0].text, None