diff --git a/.github/workflows/setup.yml b/.github/workflows/setup.yml
index f0af503..01f64dd 100644
--- a/.github/workflows/setup.yml
+++ b/.github/workflows/setup.yml
@@ -27,7 +27,7 @@ jobs:
           fi
       - name: Install poetry
         if: steps.check_fresh.outputs.is_fresh == 'true'
-        run: pipx install poetry
+        run: pipx install poetry==1.8
       - name: Example setup step
         if: steps.check_fresh.outputs.is_fresh == 'true'
         run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 16e04b2..0c157b3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,7 +27,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install poetry
         run: |
-          pipx install poetry
+          pipx install poetry==1.8
           make poetry.lock
       - uses: actions/setup-python@v5
         with:
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 7c31a5d..f2b7697 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -21,7 +21,7 @@ jobs:
           token: ${{ secrets.GH_PAT }}
       - name: Install poetry
         run: |
-          pipx install poetry
+          pipx install poetry==1.8
           make poetry.lock
       - uses: actions/setup-python@v5
         with:
@@ -55,7 +55,7 @@ jobs:
           token: ${{ secrets.GH_PAT }}
       - name: Install poetry
         run: |
-          pipx install poetry
+          pipx install poetry==1.8
           make poetry.lock
       - name: Syncing fork with upstream
         run: |