diff --git a/requirements/doc.txt b/requirements/doc.txt
index d5e5ffeaa..6c8192f63 100644
--- a/requirements/doc.txt
+++ b/requirements/doc.txt
@@ -1,4 +1,4 @@
 -r ./base.txt
-sphinx==1.5.6
+sphinx==1.6.1
 alabaster==0.7.10
 releases==1.3.0  # updated from 1.2.1