diff --git a/ippisite/docs/source/conf.py b/ippisite/docs/source/conf.py
index 65b37f440b157083ddd3bfd588b870f545e5769b..cd89d254643166fcaf92ba59d4d9aaea2062f1b8 100644
--- a/ippisite/docs/source/conf.py
+++ b/ippisite/docs/source/conf.py
@@ -48,6 +48,7 @@ extensions = [
     'sphinx.ext.autosummary',
     'sphinx.ext.autodoc',
     'sphinx.ext.intersphinx',
+    'sphinx.ext.coverage',
     'sphinx.ext.viewcode',
 ]