diff --git a/MODULE.bazel b/MODULE.bazel
index 9a30aeed..76763f76 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -46,13 +46,13 @@ python = use_extension(
     dev_dependency = True,
 )
 python.toolchain(
+    is_default = True,
     python_version = "3.8",
 )
 python.toolchain(
     python_version = "3.9",
 )
 python.toolchain(
-    is_default = True,
     python_version = "3.10",
 )
 python.toolchain(
@@ -69,7 +69,7 @@ pip_dev = use_extension(
 )
 pip_dev.parse(
     hub_name = "dwyu_mypy_deps",
-    python_version = "3.10",
+    python_version = "3.8",
     requirements_lock = "//third_party:mypy_requirements.txt",
 )
 use_repo(pip_dev, "dwyu_mypy_deps")
diff --git a/third_party/mypy_requirements.txt b/third_party/mypy_requirements.txt
index e9ba039f..8ef920ee 100644
--- a/third_party/mypy_requirements.txt
+++ b/third_party/mypy_requirements.txt
@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.10
+# This file is autogenerated by pip-compile with Python 3.8
 # by the following command:
 #
 #    bazel run //third_party:mypy_requirements.update