diff --git a/containers/xos/Dockerfile.devel b/containers/xos/Dockerfile.devel
index 32fd0b8..f187c6a 100644
--- a/containers/xos/Dockerfile.devel
+++ b/containers/xos/Dockerfile.devel
@@ -95,7 +95,7 @@
 CMD update-ca-certificates && python manage.py runserver 0.0.0.0:8000 --insecure
 
 # for OpenVPN
-RUN openssl --version
+RUN openssl
 RUN mkdir -p /opt/openvpn
 RUN cp -r /usr/share/easy-rsa/* /opt/openvpn/
 ENV EASY_RSA /opt/openvpn