diff --git a/requirements_dev.txt b/requirements_dev.txt
index 2336049..c0f1a8b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.9.0
 flake8==3.6.0
 tox==3.5.3
 coverage==4.5.1
-Sphinx==1.8.2
+Sphinx==1.8.3
 cryptography==2.4.1
 PyYAML==3.12
 pytest==4.0.2