diff --git a/docker/swarm/stack/jenkins/slave01.yml b/docker/swarm/stack/jenkins/slave01.yml
index a9643ac..4791fe3 100644
--- a/docker/swarm/stack/jenkins/slave01.yml
+++ b/docker/swarm/stack/jenkins/slave01.yml
@@ -28,6 +28,7 @@
               image: ${_param:docker_image_jenkins_slave}
               volumes:
                 - /etc/ssl/certs/java/cacerts:/etc/ssl/certs/java/cacerts:ro
+                - /dev/urandom:/dev/random:ro
                 - /var/run/docker.sock:/var/run/docker.sock
                 - /usr/bin/docker:/usr/bin/docker:ro
                 - /var/lib/jenkins:/var/lib/jenkins