diff --git a/models/problem.js b/models/problem.js
index 5b099f0..65dc5be 100644
--- a/models/problem.js
+++ b/models/problem.js
@@ -453,7 +453,7 @@ class Problem extends Model {
     }
 
     this.id = id;
-    this.save();
+    await this.save();
   }
 
   getModel() { return model; }