diff --git a/AKModel/forms.py b/AKModel/forms.py
index 1e3c5aa141c3637747c3089674b103632b0fa5e9..8295dd7ca67a9524ef8058fc57cbe6042dc7c818 100644
--- a/AKModel/forms.py
+++ b/AKModel/forms.py
@@ -304,7 +304,7 @@ class JSONScheduleImportForm(AdminIntermediateForm):
         try:
             schedule = json.loads(data)
         except json.JSONDecodeError as ex:
-            raise ValidationError(_("Cannot decode as JSON"), "invalid")
+            raise ValidationError(_("Cannot decode as JSON"), "invalid") from ex
         for field in ["input", "scheduled_aks"]:
             if not field in schedule:
                 raise ValidationError(