diff --git a/docker/Dockerfile b/docker/Dockerfile
index 816b7e2..cf26fb1 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -20,7 +20,7 @@ RUN apt-get update && \
     libsasl2-dev \
     libldap2-dev \
     npm git \
-    python-virtualenv \
+    python-virtualenv && \
     apt-get clean  && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*