diff --git a/install.sh b/install.sh
index 6791a69..ab9652b 100755
--- a/install.sh
+++ b/install.sh
@@ -114,6 +114,16 @@ count_synced_files() {
     echo "\$COUNT"
 }
 
+SCRIPT_NAME=\$(basename \$0)
+LOCKFILE="/tmp/\${SCRIPT_NAME}.lock"
+if [ -e "\$LOCKFILE" ]; then
+  echo "Scrip is already running or delete \$LOCKFILE"
+  exit 1
+fi
+
+touch "\$LOCKFILE"
+trap "rm -f '\$LOCKFILE'" EXIT
+
 SHOW_NOTIFY_START_STOP=false
 if [[ "\$1" == "--with-notify-start-stop" ]]; then
   SHOW_NOTIFY_START_STOP=true