diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4fbd65c..70cff57 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -19,4 +19,4 @@ jobs:
           HACKAGE_KEY: ${{ secrets.HACKAGE_UPLOAD_API_KEY }}
 
           # Use minimum LTS to set lowest lower bounds
-          STACK_YAML: stack-lts-16.31.yaml
+          STACK_YAML: stack-lts21.yaml