Upgrade to JDK 8
diff --git a/Dockerfile b/Dockerfile
index 6fb06b5..6a23b35 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM java:openjdk-7u65-jdk
+FROM java:8u45-jdk
 
 RUN apt-get update && apt-get install -y wget git curl zip && rm -rf /var/lib/apt/lists/*