diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index f25872102b8c27..d5b83f8e4f71d2 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -436,7 +436,7 @@ def _default_mime_types():
         '.jpe'    : 'image/jpeg',
         '.jpeg'   : 'image/jpeg',
         '.jpg'    : 'image/jpeg',
-        '.js'     : 'application/javascript',
+        '.js'     : 'text/javascript',
         '.json'   : 'application/json',
         '.ksh'    : 'text/plain',
         '.latex'  : 'application/x-latex',
diff --git a/Misc/NEWS.d/next/Library/2018-10-02-18-33-30.bpo-34875.8Js9dJ.rst b/Misc/NEWS.d/next/Library/2018-10-02-18-33-30.bpo-34875.8Js9dJ.rst
new file mode 100644
index 00000000000000..79f1b09cff2dc6
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-10-02-18-33-30.bpo-34875.8Js9dJ.rst
@@ -0,0 +1,3 @@
+Change mimetype for file extension ``.js`` to ``text/javascript``. This is currently the recommended mimetype in the whatwg HTML spec
+
+https://html.spec.whatwg.org/multipage/scripting.html#scriptingLanguages