diff --git a/lib/helpers/groups_helper.dart b/lib/helpers/groups_helper.dart
index 381e960..494405d 100644
--- a/lib/helpers/groups_helper.dart
+++ b/lib/helpers/groups_helper.dart
@@ -238,7 +238,7 @@ class GroupsHelper {
         registrationLevel:
             _APIGroupsRegistrationLevelsMap[map["registration_level"]],
         postCreationLevel: _APIGroupsPostsCreationLevelsMap[map["posts_level"]],
-        virtualDirectory: map["virtual_directory"],
+        virtualDirectory: nullToEmpty(map["virtual_directory"]),
         following: map["following"]);
   }
 
@@ -254,11 +254,11 @@ class GroupsHelper {
         registrationLevel:
             _APIGroupsRegistrationLevelsMap[map["registration_level"]],
         postCreationLevel: _APIGroupsPostsCreationLevelsMap[map["posts_level"]],
-        virtualDirectory: map["virtual_directory"],
+        virtualDirectory: nullToEmpty(map["virtual_directory"]),
         following: map["following"],
         timeCreate: map["time_create"],
         description: map["description"],
-        url: map["url"] == "null" ? "" : map["url"],
+        url: nullToEmpty(map["url"]),
         likes: map["number_likes"],
         userLike: map["is_liking"],
       );
diff --git a/lib/utils/api_utils.dart b/lib/utils/api_utils.dart
index 66255a5..13b8dbf 100644
--- a/lib/utils/api_utils.dart
+++ b/lib/utils/api_utils.dart
@@ -4,3 +4,7 @@
 
 /// Casting helper
 T cast<T>(dynamic val) => val is T ? val : null;
+
+/// Turn null and "null" into ""
+String nullToEmpty(String input) =>
+    input == null || input == "null" ? "" : input;