diff --git a/packages/jupyter-ai/jupyter_ai/utils.py b/packages/jupyter-ai/jupyter_ai/utils.py
index 3bb48d515..5706315dd 100644
--- a/packages/jupyter-ai/jupyter_ai/utils.py
+++ b/packages/jupyter-ai/jupyter_ai/utils.py
@@ -4,7 +4,7 @@
 
 class LLMErrorUtilBase:
     @staticmethod
-    def is_api_key_exc(e: Exception):
+    def is_api_key_exc(_: Exception):
         """
         Determine if the exception is an API key error. Should be implemented by subclasses.
         """
@@ -36,7 +36,7 @@ def is_api_key_exc(e: Exception):
 
 class AnthropicErrorUtility(LLMErrorUtilBase):
     @staticmethod
-    def is_api_key_exc(e):
+    def is_api_key_exc(e: Exception):
         """
         Determine if the exception is an Anthropic API key error.
         """