diff --git a/Dockerfile b/Dockerfile
index 9068e1d..5badc27 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 puppet-strings rgen
+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 librarian-puppet
diff --git a/README.md b/README.md
index e45d695..00294ef 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ This Docker image is useful for testing Puppet code, especially as the base imag
 12. pdk
 13. puppet-strings
 14. rgen (for puppet-strings)
+15. librarian-puppet
 
 ## Using this image
 To pull this image: `docker pull jacobhenner/puppet-test`
@@ -24,4 +25,4 @@ To pull this image: `docker pull jacobhenner/puppet-test`
 To run this image interactively: `docker run -it jacobhenner/puppet-test /bin/bash`
 
 ## Copyright
-See [LICENSE](LICENSE). 
\ No newline at end of file
+See [LICENSE](LICENSE).