diff --git a/lib/ace/ext/modelist.js b/lib/ace/ext/modelist.js
index 109a419e76a..3d843b6237f 100644
--- a/lib/ace/ext/modelist.js
+++ b/lib/ace/ext/modelist.js
@@ -110,7 +110,7 @@ var supportedModes = {
     Jack:        ["jack"],
     Jade:        ["jade|pug"],
     Java:        ["java"],
-    JavaScript:  ["js|jsm|jsx"],
+    JavaScript:  ["js|jsm|jsx|cjs|mjs"],
     JSON:        ["json"],
     JSON5:       ["json5"],
     JSONiq:      ["jq"],
@@ -125,6 +125,7 @@ var supportedModes = {
     Liquid:      ["liquid"],
     Lisp:        ["lisp"],
     LiveScript:  ["ls"],
+    Log:         ["log"],
     LogiQL:      ["logic|lql"],
     LSL:         ["lsl"],
     Lua:         ["lua"],