diff --git a/.github/workflows/optimized-builds.yml b/.github/workflows/optimized-builds.yml
index cca4f9f..abe458b 100644
--- a/.github/workflows/optimized-builds.yml
+++ b/.github/workflows/optimized-builds.yml
@@ -50,7 +50,7 @@ jobs:
           name: ${{ github.ref_name }}
           tag_name: ${{ github.ref_name }}
           draft: false
-          prerelease: ${{ startsWith(github.ref, 'refs/tags/v') }}
+          prerelease: ${{ !startsWith(github.ref, 'refs/tags/v') }}
           files: |
             dezoomify-rs windows-latest/dezoomify-rs.exe
             dezoomify-rs ubuntu-20.04/dezoomify-rs-linux.tgz