diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc5ec9c17..f51dcfca5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -108,7 +108,7 @@ jobs:
         strategy:
             matrix:
                 tag: [latest]
-                python-version: ['3.8', '3.9', '3.10']
+                python-version: ['3.9', '3.10']
             fail-fast: false
 
         runs-on: ubuntu-latest
diff --git a/setup.cfg b/setup.cfg
index ad6e95c5e..fb72f8d5e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -36,7 +36,7 @@ install_requires =
     nglview~=3.0
     spglib>=1.14,<3
     vapory~=0.1.2
-python_requires = >=3.8
+python_requires = >=3.9
 include_package_data = True
 zip_safe = False