diff --git a/schema/Entity.json b/schema/Entity.json
index 5567693413296f95b4d0db3efab7a70c6e42c4f5..ad4da554b1be1996b20b17e3a2eb8ce6512961de 100644
--- a/schema/Entity.json
+++ b/schema/Entity.json
@@ -186,7 +186,7 @@
       },
       "propertyNames": {
         "type": "string",
-        "pattern": "^(((\\d|[a-zA-Z]|_)+(:((\\d|[a-zA-Z]|_))+)?(#\\d+)?)$|^(@context)$"
+        "pattern": "^((\\d|[a-zA-Z]|_)+(:(\\d|[a-zA-Z]|_)+)?(#\\d+)?)$|^(@context)$"
       }
     },
     "Entity": {