diff --git a/.github/workflows/poetry.yml b/.github/workflows/poetry.yml
index ab32e461..d38fbc1a 100644
--- a/.github/workflows/poetry.yml
+++ b/.github/workflows/poetry.yml
@@ -36,10 +36,6 @@ jobs:
         uses: Gr1N/setup-poetry@v7
         with:
           poetry-version: ${{ env.POETRY_VERSION }}
-      - uses: actions/cache@v2
-        with:
-          path: ~/.cache/pypoetry/virtualenvs
-          key: ${{ runner.os }}-${{ env.PYTHON_VERISON_DEFAULT }}-poetry${{ env.POETRY_VERSION }}-${{ hashFiles('poetry.lock') }}
       - name: Install dependencies
         run: poetry install --no-root
       - name: Run tox
@@ -73,10 +69,6 @@ jobs:
         uses: Gr1N/setup-poetry@v7
         with:
           poetry-version: ${{ env.POETRY_VERSION }}
-      - uses: actions/cache@v2
-        with:
-          path: ~/.cache/pypoetry/virtualenvs
-          key: ${{ runner.os }}-${{ matrix.python-version }}-poetry${{ env.POETRY_VERSION }}-${{ hashFiles('poetry.lock') }}
       - name: Install dependencies
         run: poetry install --no-root
       - name: Run tox
@@ -127,10 +119,6 @@ jobs:
         uses: Gr1N/setup-poetry@v7
         with:
           poetry-version: ${{ env.POETRY_VERSION }}
-      - uses: actions/cache@v2
-        with:
-          path: ~/.cache/pypoetry/virtualenvs
-          key: ${{ runner.os }}}-${{ matrix.python-version }}-poetry${{ env.POETRY_VERSION }}-${{ hashFiles('poetry.lock') }}
       - name: Install dependencies
         run: poetry install --no-root
       - name: Ensure build successful
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 3537719a..f4bff783 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,9 @@
 # Contributing
 
-Feel free to open pull requests.
+Pull requests are welcome.
+But please read the
+[CycloneDX contributing guidelines](https://github.com/CycloneDX/.github/blob/master/CONTRIBUTING.md)
+first.
 
 ## Setup