diff --git a/requirements_dev.txt b/requirements_dev.txt
index 198ed72..1c20c48 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,6 +2,6 @@
 -r requirements_black.txt
 -r requirements_pypi.txt
 -r requirements_test.txt
-tox==3.18.0
+tox==3.18.1
 
 -e .