diff --git a/google_calendar.py b/google_calendar.py
index 5500982..aa2cde8 100644
--- a/google_calendar.py
+++ b/google_calendar.py
@@ -45,7 +45,7 @@ def get_service(creds: Credentials) -> Resource:
 def insert_or_update_event(
     service: Resource, id: str, title: str, start: datetime, end: datetime
 ):
-    event_id = b32hexencode(id.encode("ascii")).decode("ascii").lower()
+    event_id = b32hexencode(id.encode("ascii")).decode("ascii").lower().rstrip("=")
     event = {
         "id": event_id,
         "summary": title,