diff --git a/internal/releases/githubish/githubish.go b/internal/releases/githubish/githubish.go
index d626cc4..7f227af 100644
--- a/internal/releases/githubish/githubish.go
+++ b/internal/releases/githubish/githubish.go
@@ -28,6 +28,8 @@ type Release struct {
 	Draft       bool    `json:"draft"`
 	PublishedAt string  `json:"published_at"` // "2025-10-22T13:00:26Z"
 	Assets      []Asset `json:"assets"`
+	TarballURL  string  `json:"tarball_url"`  // auto-generated source tarball
+	ZipballURL  string  `json:"zipball_url"`  // auto-generated source zipball
 }
 
 // Asset is one downloadable file attached to a release.