diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 369b471..77248a8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      
+
       - uses: VisiumCH/check-python-style@main
         with:
           python-version: "3.10"
\ No newline at end of file
diff --git a/README.md b/README.md
index 6da4f9d..6ce249c 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      
+
       - uses: VisiumCH/check-python-style@main
         with:
           python-version: "3.10"
diff --git a/action.yml b/action.yml
index 3202030..8f61dac 100644
--- a/action.yml
+++ b/action.yml
@@ -19,7 +19,7 @@ runs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install pipenv
-        pipenv install --dev --system --deploy
+        pipenv install --categories="dev-packages packages" --system --deploy
       shell: bash
 
     - name: Check formatting