diff --git a/PCK-Studio/Forms/Editor/GameRuleFileEditor.cs b/PCK-Studio/Forms/Editor/GameRuleFileEditor.cs
index 425b2247..105e7633 100644
--- a/PCK-Studio/Forms/Editor/GameRuleFileEditor.cs
+++ b/PCK-Studio/Forms/Editor/GameRuleFileEditor.cs
@@ -289,6 +289,7 @@ namespace PckStudio.Forms.Editor
             JsonSerializer serializer = new JsonSerializer();
             serializer.Formatting = Formatting.Indented;
             serializer.Serialize(writer, _file.Root.ChildRules);
+            writer.Flush();
         }
     }
 }