diff --git a/packages/celest_core/CHANGELOG.md b/packages/celest_core/CHANGELOG.md
index 0d9be903..3e355457 100644
--- a/packages/celest_core/CHANGELOG.md
+++ b/packages/celest_core/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## 0.1.1-wip
 
 - Update README
+- Improve error message of `SerializationException`
 
 ## 0.1.0
 
diff --git a/packages/celest_core/lib/src/serialization/serializer.dart b/packages/celest_core/lib/src/serialization/serializer.dart
index 1b6bf06f..03206109 100644
--- a/packages/celest_core/lib/src/serialization/serializer.dart
+++ b/packages/celest_core/lib/src/serialization/serializer.dart
@@ -109,7 +109,8 @@ final class _Serializers extends Serializers {
     final serializer = get<Dart>();
     if (serializer == null) {
       throw SerializationException(
-        'No serializer found for $Dart. Did you forget to put() it?',
+        'No serializer found for $Dart. Did you forget to call `celest.init()` '
+        "at the start of your Flutter app's `main` function?",
       );
     }
     return serializer;