diff --git a/src/backend/Package/Register.hs b/src/backend/Package/Register.hs
index 377b247d..528a5638 100644
--- a/src/backend/Package/Register.hs
+++ b/src/backend/Package/Register.hs
@@ -288,4 +288,4 @@ writeEndpoint name version dir stream =
 
 toGithubUrl :: Pkg.Name -> Pkg.Version -> Text.Text
 toGithubUrl name version =
-  "https://github.com/" <> Text.pack (Pkg.toUrl name) <> "/zipball/" <> Pkg.versionToText version <> "/"
+  "https://github.com/" <> Text.pack (Pkg.toUrl name) <> "/zipball/" <> Pkg.versionToText version