diff --git a/collection/uni-id-users/collection.json b/collection/uni-id-users/collection.json
index 9ea80c8..522812f 100644
--- a/collection/uni-id-users/collection.json
+++ b/collection/uni-id-users/collection.json
@@ -206,7 +206,7 @@
           "Name": "username",
           "Direction": "1"
         }],
-        "MgoIsUnique": false
+        "MgoIsUnique": true
       }
     },
     {
@@ -216,7 +216,7 @@
           "Name": "mobile",
           "Direction": "1"
         }],
-        "MgoIsUnique": false
+        "MgoIsUnique": true
       }
     },
     {
@@ -226,7 +226,7 @@
           "Name": "email",
           "Direction": "1"
         }],
-        "MgoIsUnique": false
+        "MgoIsUnique": true
       }
     },
     {