diff --git a/requirements_dev.txt b/requirements_dev.txt
index 90d0dfd..4f1bf8f 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==0.9.0
 flake8==3.7.7
 tox==3.12.1
 coverage==4.5.3
-Sphinx==2.1.1
+Sphinx==2.1.2
 cryptography==2.7
 PyYAML==5.1.1
 pytest==4.6.2