diff --git a/Dockerfile b/Dockerfile
index 42b68e5..4fd6e01 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,8 @@ FROM vshn/puppet-mcoclient
 
 USER root
 
+# Cache busting
+ADD https://api.github.com/repos/optiz0r/puppet-env-manager-agent/git/refs/heads/master version.json
 # Install puppet-env-manager plugin
 RUN git clone https://github.com/optiz0r/puppet-env-manager-agent \
   && cp -r puppet-env-manager-agent/agent/* /opt/puppetlabs/mcollective/plugins/mcollective/agent/ \