diff --git a/requirements_dev.txt b/requirements_dev.txt
index 515784e..12046fb 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,7 +2,7 @@
 pip==9.0.1
 bumpversion==0.5.3
 wheel==0.30.0
-watchdog==0.8.3
+watchdog==0.9.0
 Sphinx==1.6.4
 tox==2.9.1
 flake8==3.4.1