diff --git a/napi/minify/index.js b/napi/minify/index.js
index d8a6ab1f0ac0b..28e2ec68a7723 100644
--- a/napi/minify/index.js
+++ b/napi/minify/index.js
@@ -542,7 +542,7 @@ if (!nativeBinding || process.env.NAPI_RS_FORCE_WASI) {
 
 if (!nativeBinding && globalThis.process?.versions?.["webcontainer"]) {
   try {
-    nativeBinding = require('./webcontainer-fallback.js');
+    nativeBinding = require('./webcontainer-fallback.cjs');
   } catch (err) {
     loadErrors.push(err)
   }
diff --git a/napi/minify/package.json b/napi/minify/package.json
index f3dedbe831da1..d720c82294a0b 100644
--- a/napi/minify/package.json
+++ b/napi/minify/package.json
@@ -35,7 +35,7 @@
     "index.d.ts",
     "index.js",
     "browser.js",
-    "webcontainer-fallback.js"
+    "webcontainer-fallback.cjs"
   ],
   "publishConfig": {
     "registry": "https://registry.npmjs.org/",
diff --git a/napi/minify/patch.mjs b/napi/minify/patch.mjs
index 9c002506245d2..2a8e4adc36c6d 100644
--- a/napi/minify/patch.mjs
+++ b/napi/minify/patch.mjs
@@ -8,7 +8,7 @@ data = data.replace(
     `
 if (!nativeBinding && globalThis.process?.versions?.["webcontainer"]) {
   try {
-    nativeBinding = require('./webcontainer-fallback.js');
+    nativeBinding = require('./webcontainer-fallback.cjs');
   } catch (err) {
     loadErrors.push(err)
   }
diff --git a/napi/minify/webcontainer-fallback.js b/napi/minify/webcontainer-fallback.cjs
similarity index 100%
rename from napi/minify/webcontainer-fallback.js
rename to napi/minify/webcontainer-fallback.cjs
diff --git a/napi/transform/index.js b/napi/transform/index.js
index b2a49457e13c9..4fa9f5636a663 100644
--- a/napi/transform/index.js
+++ b/napi/transform/index.js
@@ -542,7 +542,7 @@ if (!nativeBinding || process.env.NAPI_RS_FORCE_WASI) {
 
 if (!nativeBinding && globalThis.process?.versions?.["webcontainer"]) {
   try {
-    nativeBinding = require('./webcontainer-fallback.js');
+    nativeBinding = require('./webcontainer-fallback.cjs');
   } catch (err) {
     loadErrors.push(err)
   }
diff --git a/napi/transform/package.json b/napi/transform/package.json
index 86f243761b157..cb149b824b3bd 100644
--- a/napi/transform/package.json
+++ b/napi/transform/package.json
@@ -35,7 +35,7 @@
     "index.d.ts",
     "index.js",
     "browser.js",
-    "webcontainer-fallback.js"
+    "webcontainer-fallback.cjs"
   ],
   "publishConfig": {
     "registry": "https://registry.npmjs.org/",
diff --git a/napi/transform/patch.mjs b/napi/transform/patch.mjs
index 9c002506245d2..2a8e4adc36c6d 100644
--- a/napi/transform/patch.mjs
+++ b/napi/transform/patch.mjs
@@ -8,7 +8,7 @@ data = data.replace(
     `
 if (!nativeBinding && globalThis.process?.versions?.["webcontainer"]) {
   try {
-    nativeBinding = require('./webcontainer-fallback.js');
+    nativeBinding = require('./webcontainer-fallback.cjs');
   } catch (err) {
     loadErrors.push(err)
   }
diff --git a/napi/transform/webcontainer-fallback.js b/napi/transform/webcontainer-fallback.cjs
similarity index 100%
rename from napi/transform/webcontainer-fallback.js
rename to napi/transform/webcontainer-fallback.cjs