diff --git a/gitnexus/src/core/ingestion/languages/typescript.ts b/gitnexus/src/core/ingestion/languages/typescript.ts
index eb757a7b5..40b91cd8d 100644
--- a/gitnexus/src/core/ingestion/languages/typescript.ts
+++ b/gitnexus/src/core/ingestion/languages/typescript.ts
@@ -469,7 +469,7 @@ export const typescriptProvider = defineLanguage({
 
 export const javascriptProvider = defineLanguage({
   id: SupportedLanguages.JavaScript,
-  extensions: ['.js', '.jsx'],
+  extensions: ['.js', '.jsx', '.mjs', '.cjs'],
   entryPointPatterns: [/^use[A-Z]/],
   astFrameworkPatterns: [
     {
diff --git a/gitnexus/test/unit/ingestion-utils.test.ts b/gitnexus/test/unit/ingestion-utils.test.ts
index 89c01569f..c9814dc37 100644
--- a/gitnexus/test/unit/ingestion-utils.test.ts
+++ b/gitnexus/test/unit/ingestion-utils.test.ts
@@ -40,12 +40,9 @@ describe('getLanguageFromFilename', () => {
   });
 
   describe('JavaScript', () => {
-    it('detects .js files', () => {
-      expect(getLanguageFromFilename('index.js')).toBe(SupportedLanguages.JavaScript);
-    });
-
-    it('detects .jsx files', () => {
-      expect(getLanguageFromFilename('App.jsx')).toBe(SupportedLanguages.JavaScript);
+    it.each(['.js', '.jsx', '.mjs', '.cjs'])('detects %s files', (ext) => {
+      expect(getLanguageFromFilename(`module${ext}`)).toBe(SupportedLanguages.JavaScript);
+      expect(getProviderForFile(`src/module${ext}`)?.id).toBe(SupportedLanguages.JavaScript);
     });
   });