diff --git a/src/builder/schema-builder.ts b/src/builder/schema-builder.ts
index 80337c8..d543005 100644
--- a/src/builder/schema-builder.ts
+++ b/src/builder/schema-builder.ts
@@ -1,4 +1,4 @@
-import { inferIsSetFromTag, TagClass } from "../common/index";
+import { inferIsSetFromTag, TagClass } from "../common/index.js";
 import { BasicTLVBuilder } from "./basic-builder.js";
 
 type DefaultEncodeType = ArrayBuffer;