diff --git a/modules/website/wordpress/wordpress-cron-manager.sh b/modules/website/wordpress/wordpress-cron-manager.sh
index 405c1f8..7d3c6f6 100755
--- a/modules/website/wordpress/wordpress-cron-manager.sh
+++ b/modules/website/wordpress/wordpress-cron-manager.sh
@@ -375,7 +375,7 @@ get_wp_sites_cached() {
 
 # Cleanup on exit (keep cache file for next invocation, only remove lock file)
 # CRITICAL: Must unlock flock (fd 9) before removing lock file!
-trap 'flock -u 9 2>/dev/null; rm -f "$LOCK_FILE"; rollback_cleanup' EXIT INT TERM
+trap 'flock -u 9 2>/dev/null; exec 9>&-; rm -f "$LOCK_FILE"; rollback_cleanup' EXIT INT TERM
 
 # OPTIMIZATION: User extraction caching (memoization)
 # extract_user_from_path() called 10 times, often for same path