diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3c6334c0..4b81530f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -66,7 +66,9 @@ jobs:
         with:
           pandoc-version: "2.9.2"
       - name: Install tox
-        run: python -m pip install -U pip tox
+        run: |
+          python -m pip install -U pip
+          python -m pip install --use-feature=2020-resolver -U tox
       - name: Info
         run: |
           echo "=====  PYTHON  ====="
@@ -96,7 +98,9 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install tox
-        run: python -m pip install -U pip tox
+        run: |
+          python -m pip install -U pip
+          python -m pip install --use-feature=2020-resolver -U tox
       - name: Check
         run: tox -e flake8
 
@@ -120,7 +124,9 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install tox
-        run: python -m pip install -U pip tox
+        run: |
+          python -m pip install -U pip
+          python -m pip install --use-feature=2020-resolver -U tox
       - name: Check
         run: tox -e docs
 
@@ -137,12 +143,12 @@ jobs:
           python-version: 3.6
       - name: Test sdist installation on Windows
         run: |
-          python -m pip install -U pip poetry
-          poetry build
           python -m pip install -U pip
+          python -m pip install --use-feature=2020-resolver -U poetry
+          poetry build
           echo "Pip version:"
           python -m pip --version
-          python -m pip install ${env:GITHUB_WORKSPACE}\dist\pelican-4.2.0.tar.gz
+          python -m pip install --use-feature=2020-resolver ${env:GITHUB_WORKSPACE}\dist\pelican-4.2.0.tar.gz
           echo "Pelican version:"
           pelican --version
           python -m pip uninstall -y pelican
@@ -160,12 +166,12 @@ jobs:
           python-version: 3.6
       - name: Test wheel installation on Windows
         run: |
-          python -m pip install -U pip poetry
-          poetry build
           python -m pip install -U pip
+          python -m pip install --use-feature=2020-resolver -U poetry
+          poetry build
           echo "Pip version:"
           python -m pip --version
-          python -m pip install ${env:GITHUB_WORKSPACE}\dist\pelican-4.2.0-py3-none-any.whl
+          python -m pip install --use-feature=2020-resolver ${env:GITHUB_WORKSPACE}\dist\pelican-4.2.0-py3-none-any.whl
           echo "Pelican version:"
           pelican --version
           python -m pip uninstall -y pelican
@@ -186,10 +192,10 @@ jobs:
       - name: Check release
         id: check_release
         run: |
-          python -m pip install pip --upgrade
-          pip install poetry
-          pip install githubrelease
-          pip install --pre autopub
+          python -m pip install --use-feature=2020-resolver pip --upgrade
+          pip install --use-feature=2020-resolver poetry
+          pip install --use-feature=2020-resolver githubrelease
+          pip install --use-feature=2020-resolver --pre autopub
           echo "##[set-output name=release;]$(autopub check)"
       - name: Publish
         if: ${{ steps.check_release.outputs.release=='' }}