diff --git a/requirements_dev.txt b/requirements_dev.txt
index d845bb5..928e7a6 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.9.0
 flake8==3.5.0
 tox==3.1.2
 coverage==4.5.1
-Sphinx==1.7.8
+Sphinx==1.8.0
 cryptography==2.3
 PyYAML==3.12
 pytest==3.8.0