diff --git a/.github/workflows/publish_release.yml b/.github/workflows/publish_release.yml
index 6d33d8f..8ba6233 100644
--- a/.github/workflows/publish_release.yml
+++ b/.github/workflows/publish_release.yml
@@ -10,7 +10,7 @@ jobs:
       - name: Install Python 3
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.11
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
diff --git a/.github/workflows/run_various_python_versions_tf.yml b/.github/workflows/run_various_python_versions_tf.yml
index b012734..de8c27b 100644
--- a/.github/workflows/run_various_python_versions_tf.yml
+++ b/.github/workflows/run_various_python_versions_tf.yml
@@ -16,7 +16,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11"]
     steps:
       - uses: actions/checkout@v4
       - name: Install Python ${{ matrix.python-version }}
diff --git a/.github/workflows/run_various_python_versions_torch.yml b/.github/workflows/run_various_python_versions_torch.yml
index 0a61977..e4459d5 100644
--- a/.github/workflows/run_various_python_versions_torch.yml
+++ b/.github/workflows/run_various_python_versions_torch.yml
@@ -16,7 +16,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
     steps:
       - uses: actions/checkout@v4
       - name: Install Python ${{ matrix.python-version }}
diff --git a/setup.py b/setup.py
index 507a286..eb747b3 100644
--- a/setup.py
+++ b/setup.py
@@ -52,5 +52,5 @@ def get_release_arguments():
           "Topic :: Scientific/Engineering :: Artificial Intelligence"
       ],
       install_requires=read_install_requires(),
-      python_requires='>=3.9'
+      python_requires='>=3.10'
       )