diff --git a/Dockerfile b/Dockerfile
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@
 
 RUN apt-get update && apt-get install -y \
             mercurial subversion python3-pygments openssh-client \
-            mariadb-client \
+            mariadb-client procps \
             --no-install-recommends && rm -r /var/lib/apt/lists/*
 	
 RUN cd /opt && \