diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 71c3be7..bfdf49e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,4 +17,4 @@ jobs:
         run: stack upload --pvp-bounds lower .
         env:
           HACKAGE_KEY: ${{ secrets.HACKAGE_UPLOAD_API_KEY }}
-          STACK_YAML: stack-lts12.yaml
+          STACK_YAML: stack-lts20.yaml