diff --git a/bun/releases.conf b/bun/releases.conf
index 2995afb..7c6ec6a 100644
--- a/bun/releases.conf
+++ b/bun/releases.conf
@@ -1,6 +1,7 @@
 source = github
 owner = oven-sh
 repo = bun
+tag_prefix = bun-
 # non-baseline=amd64v3, -baseline=amd64
 default_x86_64 = x86_64_v3
 x86_64_v2 = baseline
diff --git a/cmd/comparecache/main.go b/cmd/comparecache/main.go
index 2dbc8a9..ad6c75e 100644
--- a/cmd/comparecache/main.go
+++ b/cmd/comparecache/main.go
@@ -556,6 +556,11 @@ func normalizeVersionFunc(pkg string) func(string) string {
 			}
 			return v
 		}
+	case "bun":
+		return func(v string) string {
+			// bun: bun-v1.3.9 → v1.3.9
+			return strings.TrimPrefix(v, "bun-")
+		}
 	case "watchexec":
 		return func(v string) string {
 			// watchexec monorepo: cli-v1.20.5 → v1.20.5