diff --git a/.github/workflows/peribolos-schema-validate.yaml b/.github/workflows/peribolos-schema-validate.yaml
index e790b914..f106a19f 100644
--- a/.github/workflows/peribolos-schema-validate.yaml
+++ b/.github/workflows/peribolos-schema-validate.yaml
@@ -29,8 +29,8 @@ jobs:
       with:
         fetch-depth: 0
         lfs: true
-    - run: pip install strictyaml --break-system-packages
+    - run: pipx install strictyaml
     - name: Validate knative.yaml
-      run: python3 peribolos/validate-schema.py peribolos/knative.yaml
+      run: pipx run peribolos/validate-schema.py peribolos/knative.yaml
     - name: Validate knative-extensions.yaml
-      run: python3 peribolos/validate-schema.py peribolos/knative-extensions.yaml
+      run: pipx run peribolos/validate-schema.py peribolos/knative-extensions.yaml