diff --git a/tag_database b/tag_database
index 64ec9dc6a..2638f0d71 100644
--- a/tag_database
+++ b/tag_database
@@ -50,7 +50,7 @@ decapitalize:string,array,intermediate
 deepClone:object,recursion,intermediate
 deepFlatten:array,recursion,intermediate
 deepFreeze:object,recursion,intermediate
-deepMapKeys:object,recursion
+deepMapKeys:object,recursion,advanced
 defaults:object,intermediate
 defer:function,intermediate
 degreesToRads:math,beginner