diff --git a/matrix_gpt/generate_clients/anthropic.py b/matrix_gpt/generate_clients/anthropic.py
index 94cd26f..ae35745 100644
--- a/matrix_gpt/generate_clients/anthropic.py
+++ b/matrix_gpt/generate_clients/anthropic.py
@@ -11,7 +11,7 @@ class AnthropicApiClient(ApiClient):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-    def _create_client(self, base_url: str = None):
+    def _create_client(self):
         return AsyncAnthropic(
             api_key=self._api_key,
             base_url=self._api_base