diff --git a/.github/workflows/build_package.yml b/.github/workflows/build_package.yml
index 026fcdd..acdcaec 100644
--- a/.github/workflows/build_package.yml
+++ b/.github/workflows/build_package.yml
@@ -33,6 +33,9 @@ jobs:
       - name: Install deps
         shell: bash
         run: poetry install
+      - name: Ensure lock works
+        shell: bash
+        run: poetry lock
       - name: Build
         shell: bash
         run: poetry build