diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d85db2e..a4b379c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -64,7 +64,12 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install poetry
-        run: pipx install poetry
+        run: |
+          if [ "${{ matrix.python_version }}" = "3.7" ]; then
+            pipx install poetry==1.6.0
+          else
+            pipx install poetry
+          fi
 
       - name: Set up Python
         id: setup-python