diff --git a/action.yml b/action.yml
index 950f6ee..a2833d7 100644
--- a/action.yml
+++ b/action.yml
@@ -32,7 +32,7 @@ runs:
   steps:
     - id: branch
       run: |
-        if [[ !${{ startsWith(github.ref, 'refs/tags/') }} ]]; then
+        if [[ ! "${{ github.ref }}" == "refs/tags/"* ]]; then
           export BASE_REF=${{ github.base_ref }}
           export HEAD_REF=${{ github.head_ref }}
           export REF=${{ github.ref }}
@@ -52,15 +52,17 @@ runs:
       shell: bash
     - id: default
       run: |
-        if [[ "${{ steps.current_branch.outputs.current_branch }}" == "${{ steps.branch.outputs.ref_branch }}" && !${{ startsWith(github.ref, 'refs/tags/') }} ]]; then
-          echo "::set-output name=is_default::true"
-        else
-          echo "::set-output name=is_default::false"
+        if [[ ! "${{ github.ref }}" == "refs/tags/"* ]]; then
+          if [[ "${{ steps.current_branch.outputs.current_branch }}" == "${{ steps.branch.outputs.ref_branch }}" ]]; then
+            echo "::set-output name=is_default::true"
+          else
+            echo "::set-output name=is_default::false"
+          fi
         fi
       shell: bash
     - id: tag
       run: |
-        if [[ ${{ startsWith(github.ref, 'refs/tags/') }} ]]; then
+        if [[ "${{ github.ref }}" == "refs/tags/"* ]]; then
           export REF=${{ github.ref }}
           TAG=${REF/refs\/tags\${{ inputs.strip_tag_prefix }}//}
           echo "::set-output name=tag::$TAG"