diff --git a/ubuntu-openjdk-7/Dockerfile b/ubuntu-openjdk-7/Dockerfile
index f5e5223f..7b3fc663 100644
--- a/ubuntu-openjdk-7/Dockerfile
+++ b/ubuntu-openjdk-7/Dockerfile
@@ -2,8 +2,8 @@ FROM ubuntu:trusty
 
 MAINTAINER itzg
 
-ENV APT_GET_UPDATE 2015-01-27
+ENV APT_GET_UPDATE 2015-02-15
 RUN apt-get update
-RUN apt-get install -y openjdk-7-jre-headless
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y openjdk-7-jre-headless && apt-get clean
 
 ENV JAVA_HOME /usr/lib/jvm/java-7-openjdk-amd64