diff --git a/src/network.sh b/src/network.sh
index b3e8d98..41b0eda 100644
--- a/src/network.sh
+++ b/src/network.sh
@@ -515,6 +515,9 @@ if [[ "$IP" == "172.17."* ]]; then
   warn "your container IP starts with 172.17.* which will cause conflicts when you install the Container Manager package inside DSM!"
 fi
 
+# Clean up old files
+rm -f /var/run/dnsmasq.pid
+
 if [[ -d "/sys/class/net/$VM_NET_TAP" ]]; then
   info "Lingering interface will be removed..."
   ip link delete "$VM_NET_TAP" || true