diff --git a/main.go b/main.go
index f9df058cd..f07cedfa0 100644
--- a/main.go
+++ b/main.go
@@ -26,7 +26,7 @@ import (
 
 const (
 	serviceName = "package-registry"
-	version     = "0.13.0"
+	version     = "0.12.1"
 )
 
 var (
diff --git a/testdata/generated/index.json b/testdata/generated/index.json
index 2da54869b..84f8b103d 100644
--- a/testdata/generated/index.json
+++ b/testdata/generated/index.json
@@ -1,4 +1,4 @@
 {
  "service.name": "package-registry",
- "service.version": "0.13.0"
+ "service.version": "0.12.1"
 }
\ No newline at end of file