Docs need virtualenv as well
diff --git a/.travis/install.sh b/.travis/install.sh
index 5b4cc51..7e77fc8 100755
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -56,6 +56,11 @@
             pyenv global 3.3.2
             pip install virtualenv
             ;;
+        docs)
+            curl -O https://raw.github.com/pypa/pip/master/contrib/get-pip.py
+            sudo python get-pip.py
+            sudo pip install virtualenv
+            ;;
     esac
     pyenv rehash
 else