diff --git a/update-agent.sh b/update-agent.sh
index a7bc58e..d14f46c 100644
--- a/update-agent.sh
+++ b/update-agent.sh
@@ -209,7 +209,7 @@ cleanup_old_backups() {
     local keep_versions=$2
     
     log "Cleaning up old backup directories (keeping $keep_versions)"
-    find "$path/backups" -maxdepth 1 -type d -name "backup-*" | sort -r | tail -n +$((keep_versions + 1)) | xargs -r rm -rf
+    find "$path/backups" -maxdepth 1 -type d -name "backup-*" 2>/dev/null | sort -r | tail -n +$((keep_versions + 1)) | xargs -r rm -rf
 }
 
 # Function to send webhook notification
@@ -321,7 +321,7 @@ process_stack() {
     fi
     
     # Ensure lock is released on exit
-    trap 'release_lock "$lock_file"' EXIT
+    trap 'release_lock "'"$lock_file"'"' EXIT
 
     log "Processing stack $name"