diff --git a/requirements/dev.txt b/requirements/dev.txt
index 230a0f4..7d946a0 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -5,5 +5,5 @@ mypy==1.11.2
 pylint==3.3.1
 pytest-cov==5.0.0
 pytest==8.3.3
-tox==4.20.0
+tox==4.21.0
 twine==5.1.1
\ No newline at end of file
diff --git a/tox.ini b/tox.ini
index 3197ac9..31e56bc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.9.0
-envlist = py39, py310, py311. py312
+envlist = py39, py310, py311, py312
 isolated_build = true
 
 [gh-actions]