diff --git a/Dockerfile b/Dockerfile
index cefeeb52410cb21fa2f2fff3a6177079aae8ed24..59ddedfcc8c32f1a4498e83100d4baa61e61c951 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,7 +12,7 @@ FROM renku/renkulab-py:3.7-renku0.10.4-0.6.3
 USER root
 RUN apt-get update && \
   apt-get install -y --no-install-recommends \
-  apt-utils 
+  apt-utils \
   firefox-geckodriver
 USER ${NB_USER}