diff --git a/mint-config-update.sh b/mint-config-update.sh
index c485b66..9afbba6 100644
--- a/mint-config-update.sh
+++ b/mint-config-update.sh
@@ -1,8 +1,13 @@
 #!/bin/bash
 
-wget -q https://gitea.ds9.dedyn.io/olli/linux-mint/raw/branch/main/mint.sh -O /tmp/mint.sh
+# lockfile for systemd-service
+trap "rm -f /run/mint-config-update.sh.lock" EXIT
+echo $$ >/run/mint-config-update.sh.lock
+
+# download and run
+wget -q https://gitea.ds9.dedyn.io/olli/linux-mint/raw/branch/main/mint.sh -O /tmp/mint.sh || exit 0
 cd /tmp
-bash -e mint.sh
+bash -n mint.sh && bash -e mint.sh
 rm mint.sh
 
 echo "Skript beendet"