diff --git a/Dockerfile b/Dockerfile
index 810aeb9e917b582096c5c5ce1bf7314f8001f096..342238fb661819ab9eda0602533ae7352d980bcc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ FROM debian:latest
 MAINTAINER Pavel Vondruska <vondruska@cesnet.cz>
 
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends fakeroot \
+    && apt-get install -y --no-install-recommends fakeroot libx11-6 \
     && rm -r /var/lib/apt/lists/* \
     && apt-get clean