diff --git a/bot.py b/bot.py
index fdea4cb..94c9044 100644
--- a/bot.py
+++ b/bot.py
@@ -21,8 +21,9 @@ STATE_PATH = os.getenv("STATE_PATH", "state.pickle")
 
 
 class State:
-    notified = []
-    notified_soon = []
+    def __init__(self) -> None:
+        self.notified = []
+        self.notified_soon = []
 
 
 def process_event(event, template):