diff --git a/ubuntu-openjdk-7/Dockerfile b/ubuntu-openjdk-7/Dockerfile
old mode 100644
new mode 100755
index 3de47f4f..d22f8844
--- a/ubuntu-openjdk-7/Dockerfile
+++ b/ubuntu-openjdk-7/Dockerfile
@@ -2,7 +2,7 @@ FROM ubuntu:trusty
 
 MAINTAINER itzg
 
-ENV APT_GET_UPDATE 2015-03-08
+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