diff --git a/tox.ini b/tox.ini
index ef76f01..2d26361 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,10 +17,10 @@ skip_install = true
 deps =
     black==22.12
 commands = black {posargs:.}
-;
-; [testenv:type]
-; description = run type checks
-; deps =
-;     mypy>=0.991
-; commands =
-;     mypy {posargs:src tests}
+
+[testenv:type]
+description = run type checks
+deps =
+    mypy>=0.991
+commands =
+    mypy {posargs:src tests}