diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fb1ed768..58ba9bda 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -55,7 +55,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check Python code formatting
         run: |
@@ -71,7 +71,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check compliance with pep8, pyflakes and circular complexity
         run: |
@@ -87,7 +87,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check compliance with Python docstring conventions
         run: |
@@ -103,7 +103,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Check Python manifest completeness
         run: |
@@ -119,7 +119,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Install system dependencies
         run: |
@@ -136,6 +136,7 @@ jobs:
 
   python-tests:
     runs-on: ubuntu-20.04
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -143,7 +144,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: "3.8"
 
       - name: Install Python dependencies
         run: |
diff --git a/setup.py b/setup.py
index a400ca37..8b3141a6 100644
--- a/setup.py
+++ b/setup.py
@@ -139,6 +139,7 @@
         ],
     },
     include_package_data=True,
+    python_requires=">=3.8",
     extras_require=extras_require,
     install_requires=install_requires,
     setup_requires=setup_requires,