diff --git a/jenkins.sh b/jenkins.sh
index 7cb355f..1bca04c 100755
--- a/jenkins.sh
+++ b/jenkins.sh
@@ -2,9 +2,9 @@
 
 # if `docker run` first argument start with `--` the user is passing jenkins launcher arguments
 if [[ $# -lt 1 ]] || [[ "$1" == "--"* ]]; then
-   exec java $JAVA_OPTS -jar /usr/share/jenkins/jenkins.war $JENKINS_OPTS --prefix=$JENKINS_PREFIX $@
+   exec java $JAVA_OPTS -jar /usr/share/jenkins/jenkins.war $JENKINS_OPTS --prefix=$JENKINS_PREFIX "$@"
 fi
 
 # As argument is not jenkins, assume user want to run his own process, for sample a `bash` shell to explore this image
-exec $@
+exec "$@"