diff --git a/.github/workflows/CI_build.yml b/.github/workflows/CI_build.yml
index b92fb9b..697cbb5 100644
--- a/.github/workflows/CI_build.yml
+++ b/.github/workflows/CI_build.yml
@@ -38,12 +38,12 @@ jobs:
       - name: Check whether import statements are used consistently
         shell: bash -l {0}
         run: poetry run isort --check-only --diff --conda-env spec2vec-dev .
-#      - name: SonarQube Scan
-#        if: github.repository == 'iomega/spec2vec'
-#        uses: SonarSource/sonarqube-scan-action@master
-#        env:
-#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-#          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+      - name: SonarQube Scan
+        if: github.repository == 'iomega/spec2vec'
+        uses: SonarSource/sonarqube-scan-action@v6
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
 
   build_pypi:
     name: Pypi and documentation build / python-${{ matrix.python-version }} / ${{ matrix.os }}
diff --git a/conda/meta.yaml b/conda/meta.yaml
index a7d2e82..b60c770 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -1,5 +1,5 @@
 {% set name = "spec2vec" %}
-{% set version = "0.9.0" %}
+{% set version = "0.9.1" %}
 
 package:
   name: {{ name|lower }}
diff --git a/spec2vec/SpectrumDocument.py b/spec2vec/SpectrumDocument.py
index 66ba46b..f63d4ce 100644
--- a/spec2vec/SpectrumDocument.py
+++ b/spec2vec/SpectrumDocument.py
@@ -54,7 +54,6 @@ def __init__(self, spectrum: Spectrum, n_decimals: int = 2):
         self.weights = None
         super().__init__(obj=spectrum)
         self._add_weights()
-        self._obj: Spectrum = self._obj
 
     def _make_words(self) -> list[str]:
         """Create word from peaks (and losses)."""