diff --git a/requirements_dev.txt b/requirements_dev.txt
index d477a77..89ebf26 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,7 +1,7 @@
 pip==9.0.1
 bumpversion==0.5.3
 wheel==0.29.0
-watchdog==0.8.3
+watchdog==0.9.0
 flake8==3.2.1
 tox==2.5.0
 coverage==4.2