diff --git a/caimira/docs/conf.py b/caimira/docs/conf.py
index 2b9f7aaf..3982967b 100644
--- a/caimira/docs/conf.py
+++ b/caimira/docs/conf.py
@@ -30,7 +30,7 @@ release = '4.1.1'
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['sphinx.ext.autodoc']
+extensions = ['sphinx.ext.autodoc', 'sphinx_rtd_theme']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']