diff --git a/apps/hrm/tasks.py b/apps/hrm/tasks.py
index 9a1744ae..542ac4ba 100755
--- a/apps/hrm/tasks.py
+++ b/apps/hrm/tasks.py
@@ -132,4 +132,5 @@ def update_global_face_pd():
     facedata = Employee.objects.filter(facenet512_data__isnull=False, 
                     user__is_active=True).values_list('id', 'facenet512_data')
     cache.set('global_face_data', facedata, timeout=None)
+    global global_face_df
     global_face_df = pd.DataFrame(list(facedata), columns=["identity", "Facenet512_representation"])