diff --git a/Dockerfile b/Dockerfile
index 8a70e17..9068e1d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,4 +2,4 @@ FROM ruby:2.4
 
 MAINTAINER Jacob Henner <code@ventricle.us>
 
-RUN gem install puppet puppet-lint puppet-syntax rspec-puppet puppetlabs_spec_helper jsonlint yaml-lint metadata-json-lint  semantic_puppet rubocop rubocop-rspec pdk
+RUN gem install puppet puppet-lint puppet-syntax rspec-puppet puppetlabs_spec_helper jsonlint yaml-lint metadata-json-lint semantic_puppet rubocop rubocop-rspec pdk puppet-strings rgen
diff --git a/README.md b/README.md
index 2e08913..e45d695 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,8 @@ This Docker image is useful for testing Puppet code, especially as the base imag
 10. rubocop
 11. rubocop-rspec
 12. pdk
+13. puppet-strings
+14. rgen (for puppet-strings)
 
 ## Using this image
 To pull this image: `docker pull jacobhenner/puppet-test`