diff --git a/requirements_dev.txt b/requirements_dev.txt
index 07dfb27..9355f2e 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.9.0
 flake8==3.7.9
 tox==3.14.2
 coverage==4.5.4
-Sphinx==2.2.2
+Sphinx==2.3.0
 cryptography==2.8
 PyYAML==5.2
 pytest==5.3.1