diff --git a/terragrunt/find-changes/action.yml b/terragrunt/find-changes/action.yml
index 50e3e51..3d4b7cf 100644
--- a/terragrunt/find-changes/action.yml
+++ b/terragrunt/find-changes/action.yml
@@ -56,4 +56,4 @@ runs:
       env:
         GITHUB_TOKEN: ${{ inputs.github-token }}
         PR_NUMBER: ${{ inputs.pr-number }}
-        HEAD_COMMIT: ${{ inputs.head_commit }}
+        HEAD_COMMIT: ${{ inputs.head-commit }}