diff --git a/constraints.txt b/constraints.txt
index 0502f54..9bf0239 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -64,4 +64,4 @@ sphinx>=9.1.0,<10.0.0
 sphinx-rtd-theme>=3.1.0,<4.0.0
 
 # Development utilities
-tox>=4.61.2,<5.0.0
+tox>=4.64.3,<5.0.0