diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9f44470..2fdc0d4 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -12,7 +12,7 @@ pytest-cov==2.5.1
 pytest-runner==2.11.1
 pytest==3.1.2
 PyYAML==3.12
-Sphinx==1.6.3
+Sphinx==2.4.3
 tox==2.7.0
 watchdog==0.8.3
 wheel==0.29.0