diff --git a/CHANGELOG.md b/CHANGELOG.md
index d58625e..a5864ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# 1.0.4-dev
+
+* Changed `.js` to `text/javascript` per 
+  https://datatracker.ietf.org/doc/html/rfc9239.
+* Added `.mjs` as `text/javascript`.
+
 # 1.0.3
 
 * Add application/manifest+json lookup by extension.
diff --git a/lib/src/default_extension_map.dart b/lib/src/default_extension_map.dart
index e66733f..c2de6b9 100644
--- a/lib/src/default_extension_map.dart
+++ b/lib/src/default_extension_map.dart
@@ -367,7 +367,7 @@ const Map<String, String> defaultExtensionMap = <String, String>{
   'jpgm': 'video/jpm',
   'jpgv': 'video/jpeg',
   'jpm': 'video/jpm',
-  'js': 'application/javascript',
+  'js': 'text/javascript',
   'json': 'application/json',
   'jsonml': 'application/jsonml+json',
   'kar': 'audio/midi',
@@ -451,6 +451,7 @@ const Map<String, String> defaultExtensionMap = <String, String>{
   'mime': 'message/rfc822',
   'mj2': 'video/mj2',
   'mjp2': 'video/mj2',
+  'mjs': 'text/javascript',
   'mk3d': 'video/x-matroska',
   'mka': 'audio/x-matroska',
   'mks': 'video/x-matroska',
diff --git a/pubspec.yaml b/pubspec.yaml
index b675981..144d0e6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mime
-version: 1.0.3
+version: 1.0.4-dev
 description: >-
   Utilities for handling media (MIME) types, including determining a type from
   a file extension and file contents.
diff --git a/test/mime_type_test.dart b/test/mime_type_test.dart
index e99214a..264f18c 100644
--- a/test/mime_type_test.dart
+++ b/test/mime_type_test.dart
@@ -35,7 +35,8 @@ void main() {
       _expectMimeType('file.cc', 'text/x-c');
       _expectMimeType('file.c', 'text/x-c');
       _expectMimeType('file.css', 'text/css');
-      _expectMimeType('file.js', 'application/javascript');
+      _expectMimeType('file.js', 'text/javascript');
+      _expectMimeType('file.mjs', 'text/javascript');
       _expectMimeType('file.ps', 'application/postscript');
       _expectMimeType('file.pdf', 'application/pdf');
       _expectMimeType('file.tiff', 'image/tiff');