diff --git a/Dockerfile b/Dockerfile
index 172d1836e35accfd0447ee896194b8f6009e06b8..cc5774541f0ced873666932c1fd9aa90db4aa8a6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ FROM jupyter/scipy-notebook:hub-1.5.0
 USER root
 RUN apt-get update -y
 RUN apt-get install -y git
-RUN apt-get install libopenmpi-dev
+RUN apt-get install -y libopenmpi-dev
 
 # Install XPRA
 #RUN apt-get install -y gnupg2 apt-transport-https software-properties-common apt-utils mc