diff --git a/src/Umbraco.Web.BackOffice/Authorization/AdminUsersHandler.cs b/src/Umbraco.Web.BackOffice/Authorization/AdminUsersHandler.cs
index 3a4e125a28..b40904f460 100644
--- a/src/Umbraco.Web.BackOffice/Authorization/AdminUsersHandler.cs
+++ b/src/Umbraco.Web.BackOffice/Authorization/AdminUsersHandler.cs
@@ -57,7 +57,9 @@ namespace Umbraco.Web.BackOffice.Authorization
                     // must succeed this requirement since we cannot process it
                     return Task.FromResult(true);
                 }
-                userIds = ids.Select(x => x.Value.TryConvertTo<int>()).Where(x => x.Success).Select(x => x.Result).ToArray();
+                userIds = ids
+                    .Select(x => x.Value.ToString())
+                    .Select(x => x.TryConvertTo<int>()).Where(x => x.Success).Select(x => x.Result).ToArray();
             }
 
             if (userIds.Length == 0)
diff --git a/src/Umbraco.Web.BackOffice/Authorization/UserGroupHandler.cs b/src/Umbraco.Web.BackOffice/Authorization/UserGroupHandler.cs
index f5c6e0ea2d..fc1db9699b 100644
--- a/src/Umbraco.Web.BackOffice/Authorization/UserGroupHandler.cs
+++ b/src/Umbraco.Web.BackOffice/Authorization/UserGroupHandler.cs
@@ -54,7 +54,10 @@ namespace Umbraco.Web.BackOffice.Authorization
                 return Task.FromResult(true);
             }
 
-            var intIds = ids.Select(x => x.Value.TryConvertTo<int>()).Where(x => x.Success).Select(x => x.Result).ToArray();
+            var intIds = ids
+                .Select(x => x.Value.ToString())
+                .Select(x => x.TryConvertTo<int>()).Where(x => x.Success).Select(x => x.Result).ToArray();
+
             var authHelper = new UserGroupEditorAuthorizationHelper(
                 _userService,
                 _contentService,