diff --git a/README.md b/README.md
index d8bce20..9c2c4d7 100644
--- a/README.md
+++ b/README.md
@@ -29,28 +29,41 @@ defined in [`.gitlab-ci.yml`](.gitlab-ci.yml):
 ```yaml
 image: elecnix/ikiwiki
 
+before_script:
+  - apt-get install -y git
+  - git submodule init
+  - git submodule update
+
 test:
   stage: test
-  script: ikiwiki --setup .ikiwiki/ikiwiki.setup
-  except:
-  - master
+  script:
+  - ikiwiki --setup .ikiwiki/ikiwiki.setup --libdir themes/ikistrap/lib
+  only:
+  - branches
+  - tags
 
 pages:
   stage: deploy
-  script: ikiwiki --setup .ikiwiki/ikiwiki.setup
+  script:
+  - ikiwiki --setup .ikiwiki/ikiwiki.setup --libdir themes/ikistrap/lib
   artifacts:
     paths:
     - public
   only:
   - master
 ```
+
+We are using a theme based on Bootstrap 4 using submodules, and in order to
+enable the theme plugin, we must pass the `libdir` parameter.
+
 ## Building locally
 
 To work locally with this project, you'll have to follow the steps below:
 
 1. Fork, clone or download this project
 1. [Install][] ikiwiki
-1. Generate the website: `ikiwiki --setup .ikiwiki/ikiwiki.setup`
+1. Clone the submodules: `git submodule init && git submodule update`
+1. Generate the website: `ikiwiki --setup .ikiwiki/ikiwiki.setup --libdir themes/ikistrap/lib`
 1. Preview your project: open `public/index.html` in a browser
 
 Read more at ikiwiki's [documentation][].
@@ -83,4 +96,4 @@ unless you want to contribute back to the upstream project.
 [install]: https://ikiwiki.info/install/
 [documentation]: https://ikiwiki.info/
 [userpages]: http://doc.gitlab.com/ee/pages/README.html#user-or-group-pages
-[projpages]: http://doc.gitlab.com/ee/pages/README.html#project-pages
\ No newline at end of file
+[projpages]: http://doc.gitlab.com/ee/pages/README.html#project-pages