diff --git a/requirements_dev.txt b/requirements_dev.txt
index 15bcedc..f108de5 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,5 +4,5 @@ twine==1.13.0
 pytest==4.4.1
 pytest-cov==2.6.1
 coveralls==1.7.0
-sphinx==2.0.1
+sphinx==2.1.0
 bump2version==0.5.10