diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 7fedf53..9180f57 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -32,9 +32,6 @@ jobs:
       - name: Lint with pep8
         run: |
           pycodestyle --max-line-length=140 --ignore=E501 --first --statistics postgresql_kernel
-      - name: Perpare for static check
-        run: |
-          mypy --install-types
       - name: Static check with mypy
         run: |
           mypy --ignore-missing-imports --show-column-numbers --follow-imports=silent --check-untyped-defs --disallow-untyped-defs --no-implicit-optional --warn-unused-ignores --scripts-are-modules postgresql_kernel