diff --git a/Dockerfile b/Dockerfile
index 7b156b9..d2a9f28 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,8 @@ MAINTAINER Marcel Otte <qwc+docker@mmo.to>
 RUN apt-get update && apt-get install -y openjdk-8-jre wget unzip
 RUN mkdir /terasology \
     && wget -P /terasology http://jenkins.terasology.org/job/DistroOmega/lastSuccessfulBuild/artifact/distros/omega/build/distributions/TerasologyOmega.zip \
-    && unzip /terasology/TerasologyOmega.zip -d /terasology
+    && unzip /terasology/TerasologyOmega.zip -d /terasology \
+    && rm -f /terasology/TerasologyOmega.zip
 ENTRYPOINT java -jar /terasology/libs/Terasology.jar -headless -homedir=/terasology/server
 VOLUME /terasology/server
 EXPOSE 25777