diff --git a/.github/workflows/upload-to-pypi.yml b/.github/workflows/upload-to-pypi.yml
index 38a9d60..40a91ac 100644
--- a/.github/workflows/upload-to-pypi.yml
+++ b/.github/workflows/upload-to-pypi.yml
@@ -7,6 +7,9 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    permissions:
+      # IMPORTANT: this permission is mandatory for trusted publishing
+      id-token: write
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python
@@ -22,6 +25,3 @@ jobs:
         hatch build
     - name: Publish distribution to PyPI
       uses: pypa/gh-action-pypi-publish@release/v1
-      with:
-        user: ${{ secrets.PYPI_USERNAME }}
-        password: ${{ secrets.PYPI_PASSWORD }}
diff --git a/ceurws/wikidatasync.py b/ceurws/wikidatasync.py
index 7332ab3..ccd6458 100644
--- a/ceurws/wikidatasync.py
+++ b/ceurws/wikidatasync.py
@@ -822,6 +822,9 @@ class DblpEndpoint:
     DBLP_EVENT_PREFIX = "https://dblp.org/db/"
 
     def __init__(self, endpoint):
+        """
+        constructor
+        """
         self.sparql = SPARQL(endpoint)
         path = os.path.dirname(__file__)
         qYamlFile = f"{path}/resources/queries/dblp.yaml"