diff --git a/tap_github/authenticator.py b/tap_github/authenticator.py
index d873b77..4d5182b 100644
--- a/tap_github/authenticator.py
+++ b/tap_github/authenticator.py
@@ -227,7 +227,7 @@ def has_calls_remaining(self) -> bool:
                 self.claim_token()
                 if self.token is None:
                     if self.logger:
-                        self.logger.warn("GitHub app token refresh failed.")
+                        self.logger.warning("GitHub app token refresh failed.")
                     return False
                 else:
                     if self.logger:
@@ -308,7 +308,7 @@ def prepare_tokens(self) -> list[TokenManager]:
                 if app_token_manager.is_valid_token():
                     app_token_managers.append(app_token_manager)
             except ValueError as e:
-                self.logger.warn(
+                self.logger.warning(
                     f"An error was thrown while preparing an app token: {e}"
                 )
 
diff --git a/tap_github/tests/test_authenticator.py b/tap_github/tests/test_authenticator.py
index 042e483..5c59ce1 100644
--- a/tap_github/tests/test_authenticator.py
+++ b/tap_github/tests/test_authenticator.py
@@ -215,10 +215,10 @@ def test_has_calls_remaining_logs_warning_if_token_regeneration_fails(self):
 
             mock_is_valid.return_value = False
             assert not token_manager.has_calls_remaining()
-            token_manager.logger.warn.assert_called_once()
+            token_manager.logger.warning.assert_called_once()
             assert (
                 "GitHub app token refresh failed."
-                in token_manager.logger.warn.call_args[0][0]
+                in token_manager.logger.warning.call_args[0][0]
             )
 
     def test_has_calls_remaining_succeeds_if_token_new_and_never_used(self):
@@ -537,7 +537,7 @@ def test_handle_error_if_app_key_invalid(self, mock_stream):
             auth = GitHubTokenAuthenticator(stream=mock_stream)
             auth.prepare_tokens()
 
-            mock_stream.logger.warn.assert_called_with(
+            mock_stream.logger.warning.assert_called_with(
                 "An error was thrown while preparing an app token: Invalid key format"
             )