diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index 0c2d02551d..09b8bf8648 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -33,11 +33,11 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
-          BRANCHES=$(gh pr list --repo "${{ github.repository }}" --search "${{ github.sha }}" --json headRefName --jq '.[].headRefName')
-          MAIN_BRANCH=$(echo $BRANCH_NAMES | grep -o 'main')
+          BRANCHES=${gh pr list --repo "${{ github.repository }}" --search "${{ github.sha }}" --json headRefName --jq '.[].headRefName'}
+          MAIN_BRANCH=${echo $BRANCH_NAMES | grep -o 'main'}
           echo "::set-output name=branch::$MAIN_BRANCH"
 
-          PR_NUMBER=$(gh pr list --repo "${{ github.repository }}" --search "${{ github.sha }}" --json number --jq '.[0].number')
+          PR_NUMBER=${gh pr list --repo "${{ github.repository }}" --search "${{ github.sha }}" --json number --jq '.[0].number'}
           echo "::set-output name=pr_number::$PR_NUMBER"
 
       # skip if branch is main