diff --git a/.travis.yml b/.travis.yml
index 007eacea3..4f65a58ec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: python
 install:
-- pip install mkdocs-material
+- pip install mkdocs-material pygments
 script:
 - mkdocs build --verbose --clean
 deploy: