diff --git a/requirements_dev.txt b/requirements_dev.txt
index 3d64f42..c3aae84 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -3,7 +3,7 @@ bumpversion==0.6.0
 wheel==0.37.1
 watchdog==2.1.8
 flake8==4.0.1
-tox==3.25.0
+tox==3.26.0
 coverage==6.2
 cryptography==35.0.0
 Sphinx==4.5.0