diff --git a/concourse/docker/Dockerfile b/concourse/docker/Dockerfile
index 2443ead94..a2e0c6d5d 100644
--- a/concourse/docker/Dockerfile
+++ b/concourse/docker/Dockerfile
@@ -10,7 +10,7 @@ RUN apt-get update && apt-get install -y \
   openjdk-8-jdk \
   curl \
   xvfb \
-  icewm icewm-themes
+  icewm
 
 RUN curl -sL https://deb.nodesource.com/setup_8.x | bash - \
   && apt-get install -y nodejs