diff --git a/.github/workflows/python_build.yml b/.github/workflows/python_build.yml
index 9618aca..1debbee 100644
--- a/.github/workflows/python_build.yml
+++ b/.github/workflows/python_build.yml
@@ -17,7 +17,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
+          python -m pip install pip==21
           pip install -r requirements.txt
       - name: Lint with flake8
         run: |
diff --git a/pyproject.toml b/pyproject.toml
index cc4975f..2beee6a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=40.6.0", "wheel"]
+requires = ["setuptools==65.5.0", "wheel"]
 build-backend = "setuptools.build_meta"