diff --git a/requirements.txt b/requirements.txt
index 27d0f93..b5387d7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,6 @@ pypandoc==1.11
 python-gflags==3.1.2
 chardet==5.2.0
 toml==0.10.2
-tox==4.6.4
+tox==4.52.0
 pyyaml==6.0.1
 oauth2client==4.1.3