diff --git a/napi/oxlint2/src-js/index.js b/napi/oxlint2/src-js/index.ts
similarity index 99%
rename from napi/oxlint2/src-js/index.js
rename to napi/oxlint2/src-js/index.ts
index 7cf897995f968..54484994a8d96 100644
--- a/napi/oxlint2/src-js/index.js
+++ b/napi/oxlint2/src-js/index.ts
@@ -222,6 +222,7 @@ function lintFile([filePath, bufferId, buffer, ruleIds]) {
 // --------------------
 
 // Call Rust, passing `loadPlugin` and `lintFile` as callbacks
+// @ts-expect-error
 const success = await lint(loadPlugin, lintFile);
 
 // Note: It's recommended to set `process.exitCode` instead of calling `process.exit()`.
diff --git a/napi/oxlint2/src-js/utils.js b/napi/oxlint2/src-js/utils.ts
similarity index 100%
rename from napi/oxlint2/src-js/utils.js
rename to napi/oxlint2/src-js/utils.ts
diff --git a/napi/oxlint2/src-js/visitor.js b/napi/oxlint2/src-js/visitor.ts
similarity index 99%
rename from napi/oxlint2/src-js/visitor.js
rename to napi/oxlint2/src-js/visitor.ts
index 0e814fa14d781..801a2b218ff97 100644
--- a/napi/oxlint2/src-js/visitor.js
+++ b/napi/oxlint2/src-js/visitor.ts
@@ -341,6 +341,7 @@ function mergeVisitFns(visitFns) {
   } else {
     merger = mergers[numVisitFns];
     if (merger === null) {
+      // @ts-expect-error
       merger = mergers[numVisitFns] = createMerger(numVisitFns);
     }
   }
diff --git a/napi/oxlint2/tsdown.config.ts b/napi/oxlint2/tsdown.config.ts
index 9bc3d0edf7443..eec0a7548820f 100644
--- a/napi/oxlint2/tsdown.config.ts
+++ b/napi/oxlint2/tsdown.config.ts
@@ -1,7 +1,7 @@
 import { defineConfig } from 'tsdown';
 
 export default defineConfig({
-  entry: ['src-js/index.js'],
+  entry: ['src-js/index.ts'],
   format: ['esm'],
   platform: 'node',
   target: 'node20',