diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9a4e68c..9fc207a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,7 +23,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Bootstrap Poetry
-        run: curl -sSL https://install.python-poetry.org | python - -y
+        run: curl -sSL https://install.python-poetry.org | python - -y --version 1.5.1
 
       - name: Build project for distribution
         run: poetry build
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8a95604..84d14a5 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -48,7 +48,7 @@ jobs:
         run: echo version=$(python -c "import sys; print('-'.join(str(v) for v in sys.version_info))") >> $GITHUB_OUTPUT
 
       - name: Bootstrap Poetry
-        run: curl -sSL https://install.python-poetry.org | python - -y
+        run: curl -sSL https://install.python-poetry.org | python - -y --version 1.5.1
 
       - name: Configure Poetry
         run: poetry config virtualenvs.in-project true