diff --git a/requirements_dev.txt b/requirements_dev.txt
index 054dcc6..6454fb1 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@ bump2version==0.5.11
 wheel==0.33.6
 watchdog==0.9.0
 flake8==3.7.9
-tox==3.14.0
+tox==3.14.5
 coverage==5.0.3
 Sphinx==2.3.1
 twine==3.1.1