diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 74c3488..581944c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,7 +30,7 @@ jobs:
 
       - name: Install project dependencies
         run: |
-          pip install -upgrade pip
+          pip install --upgrade pip
           pip install codecov tox tox-gh-actions
 
       - name: Run tests with tox