diff --git a/.travis.yml b/.travis.yml
index f764bc17b..78aaaeffe 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,4 +19,6 @@ script:
   - ./hugo -s docs/
   - ./hugo --renderToMemory -s docs/
 before_install:
+  # gem install must be run with sudo on OSX 
+  - sudo gem install asciidoctor | gem install asciidoctor 
   - sudo pip install docutils