diff --git a/requirements_dev.txt b/requirements_dev.txt
index 300dac8..3085e21 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,7 +1,7 @@
 wheel==0.33.6
 watchdog==0.9.0
 flake8==3.7.8
-tox==3.14.1
+tox==3.24.2
 coverage==4.5.3
 pytest==5.2.2
 pytest-runner==5.1