diff --git a/resources/views/operasi/edit_marginmutu.blade.php b/resources/views/operasi/edit_marginmutu.blade.php
index 2af31e0..0cfe9f7 100644
--- a/resources/views/operasi/edit_marginmutu.blade.php
+++ b/resources/views/operasi/edit_marginmutu.blade.php
@@ -136,6 +136,10 @@ $(document).ready(function() {
             }
         });
     });
+
+    $('input[type="number"]').on('keydown', function(e) {
+        if (['e', 'E', '+', '-'].includes(e.key)) e.preventDefault();
+    });
 });
 </script>
 @endsection
\ No newline at end of file