diff --git a/requirements_dev.txt b/requirements_dev.txt
index c520b11..7a30c59 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,5 +5,5 @@ watchdog==0.8.3
 flake8==3.4.1
 tox==2.7.0
 coverage==4.4.1
-Sphinx==1.6.3
+Sphinx==1.6.4
 isort==4.2.15
\ No newline at end of file