diff --git a/Dockerfile b/Dockerfile
index 6187fa0..61aef7e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,7 @@ ARG maintainer=tier
 ARG imagename=shibboleth_idp
 ARG version=3.2.1
 ENV VERSION=$version
+ENV JAVA_OPTS=-Xmx1500m -XX:MaxPermSize=128m
 
 RUN chown -R root:root /opt/shibboleth/shibboleth-identity-provider-$version && \
     ANT_OPTS="-Didp.target.dir=/opt/shibboleth/current" /opt/shibboleth/current/bin/build.sh && \