diff --git a/shims.json b/shims.json
index 1136162c..0c5430a8 100644
--- a/shims.json
+++ b/shims.json
@@ -1,6 +1,6 @@
 {
     "Object": {
-        "prototype": {}
+        "prototype": {},
         "keys": "object-keys"
     }
 }