diff --git a/lib/pangea/course_plans/courses/course_plan_room_extension.dart b/lib/pangea/course_plans/courses/course_plan_room_extension.dart
index cb9110a17..a1ef6f660 100644
--- a/lib/pangea/course_plans/courses/course_plan_room_extension.dart
+++ b/lib/pangea/course_plans/courses/course_plan_room_extension.dart
@@ -90,7 +90,7 @@ extension CoursePlanRoomExtension on Room {
         if (activity.imageURL != null)
           StateEvent(
             type: EventTypes.RoomAvatar,
-            content: {'url': activity.imageURL!},
+            content: {'url': activity.imageURL!.toString()},
           ),
         if (role != null)
           StateEvent(
diff --git a/pubspec.yaml b/pubspec.yaml
index 0270e844f..bdadb9637 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -6,7 +6,7 @@ description: Learn a language while texting your friends.
 # Pangea#
 publish_to: none
 # On version bump also increase the build number for F-Droid
-version: 4.1.16+3
+version: 4.1.16+4
 
 environment:
   sdk: ">=3.0.0 <4.0.0"