diff --git a/setup.py b/setup.py
index bfc110c12..89aaeba07 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@ with open('requirements.txt') as f:
   requirements = f.read().splitlines()
 
 if on_rtd:
-  requirements.append('sphinx==1.6.5')
+  requirements.append('sphinx==1.7.4')
   requirements.append('sphinxcontrib-napoleon')
   requirements.append('sphinxcontrib-asyncio')
   requirements.append('sphinxcontrib-websupport')