diff --git a/ipykernel/kernelbase.py b/ipykernel/kernelbase.py
index ad2fd23d..20c7a74c 100644
--- a/ipykernel/kernelbase.py
+++ b/ipykernel/kernelbase.py
@@ -895,7 +895,7 @@ def kernel_info(self):
             "language_info": self.language_info,
             "banner": self.banner,
             "help_links": self.help_links,
-            "supported_features": supported_features
+            "supported_features": supported_features,
         }
         return info