diff --git a/client/bs_shutdown.py b/client/bs_shutdown.py
index 2234e23..8ecea39 100644
--- a/client/bs_shutdown.py
+++ b/client/bs_shutdown.py
@@ -37,6 +37,7 @@ def to_seconds(t):
     return t.hour * 3600 + t.minute * 60 + t.second
 
 def update():
+    global LAST_VALUE
     data = get_data()
     if data["noshutdown"] == 1:
         exit