diff --git a/tox.ini b/tox.ini
index 45b73b5..3a085c0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,7 @@ commands =
 
 [testenv:typecheck]
 description = run type check on code base
+base_python = {[type]base_python}
 skip_install = true
 deps =
     {[type]deps}
@@ -22,6 +23,7 @@ commands =
 
 [testenv:stubgen]
 description = generate stubs
+base_python = {[type]base_python}
 skip_install = true
 deps =
     {[type]deps}
@@ -54,5 +56,6 @@ allowlist_externals =
     bash
 
 [type]
+base_python = python3.12
 deps =
     mypy[python2]==0.971