diff --git a/buf.gen.yaml b/buf.gen.yaml
index daec499..652f41a 100644
--- a/buf.gen.yaml
+++ b/buf.gen.yaml
@@ -2,4 +2,4 @@ version: v2
 plugins:
   - remote: buf.build/bufbuild/es:v2.1.0
     out: packages/ts/lib
-    opt: target=ts
+    opt: target=ts,import_extension=.ts