diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8c99a86..a79c7aa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
+env:
+  UV_LOCKED: "1"
+
 defaults:
   run:
     shell: bash