diff --git a/ubuntu-openjdk-7/Dockerfile b/ubuntu-openjdk-7/Dockerfile
index d22f8844..a5302d07 100755
--- a/ubuntu-openjdk-7/Dockerfile
+++ b/ubuntu-openjdk-7/Dockerfile
@@ -4,6 +4,8 @@ MAINTAINER itzg
 
 ENV APT_GET_UPDATE 2015-07-16
 RUN apt-get update
-RUN DEBIAN_FRONTEND=noninteractive apt-get install -y openjdk-7-jre-headless wget && apt-get clean
+RUN DEBIAN_FRONTEND=noninteractive \
+  apt-get -q -y install openjdk-7-jre-headless wget unzip \
+  && apt-get clean
 
 ENV JAVA_HOME /usr/lib/jvm/java-7-openjdk-amd64