diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 40149c54..0ce41298 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -34,10 +34,6 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python }}
-    - name: Install tox
-      run: |
-        python -m pip install --upgrade pip
-        pip install tox
     - name: Test
       run: |
         tox -e ${{ matrix.tox_env }}  
diff --git a/pyproject.toml b/pyproject.toml
index c41f8d2e..6c4208d1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,8 @@
 [build-system]
 requires = [
     "setuptools",
-    "setuptools_scm[toml]"
+    "setuptools_scm[toml]",
+    "setuptools_scm[toml]<5; python_version == \"2.7\"",
     
 ]
 build-backend = "setuptools.build_meta"