diff --git a/requirements-build.txt b/requirements-build.txt
index d0dd732..e38e591 100644
--- a/requirements-build.txt
+++ b/requirements-build.txt
@@ -4,4 +4,4 @@ virtualenv~=20.31
 setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability
 logilab-common~=2.1
 m2r~=0.3
-tox~=4.25
+tox~=4.26