diff --git a/bin/gen_calendar_entries.py b/bin/gen_calendar_entries.py
index 711702e28ac..96772ddc016 100755
--- a/bin/gen_calendar_entries.py
+++ b/bin/gen_calendar_entries.py
@@ -105,7 +105,7 @@ def release_candidate(args: RCArguments) -> None:
 
     data = read_calendar()
 
-    with CALENDAR_CSV.open('w') as f:
+    with CALENDAR_CSV.open('w', newline='') as f:
         writer = csv.writer(f)
         writer.writerows(data)
 
@@ -147,7 +147,7 @@ def final_release(args: FinalArguments) -> None:
     data = read_calendar()
     date = _calculate_next_release_date(not args.zero_released)
 
-    with CALENDAR_CSV.open('w') as f:
+    with CALENDAR_CSV.open('w', newline='') as f:
         writer = csv.writer(f)
         writer.writerows(data)
 
@@ -199,7 +199,7 @@ def extend(args: ExtendArguments) -> None:
 
     current = read_calendar()
 
-    with CALENDAR_CSV.open('w') as f:
+    with CALENDAR_CSV.open('w', newline='') as f:
         writer = csv.writer(f)
         with write_existing(writer, current) as row:
             # Get rid of -rcX as well