diff --git a/requirements-build-online.txt b/requirements-build-online.txt
index d3cdc65..ccceba6 100644
--- a/requirements-build-online.txt
+++ b/requirements-build-online.txt
@@ -3,3 +3,4 @@ Sphinx==1.2.2
 sphinx-rtd-theme==0.1.6
 CommonMark==0.5.4
 six==1.9.0
+alabaster!=0.7.5
diff --git a/setup.py b/setup.py
index 16a3195..03cb240 100644
--- a/setup.py
+++ b/setup.py
@@ -11,6 +11,7 @@
       zip_safe=False,
       install_requires=[
           'CommonMark',
-          'six'
+          'six',
+          'alabaster'
           ]
       )