commit 1cbb465aa92f7cb903f7900e0e43cc08294fc649
Author: Tom Hughes <tom@compton.nu>
Date:   Thu Sep 20 18:55:15 2018 +0100

    Update for npm(mime) version 2.x

diff --git a/bin/lessc b/bin/lessc
index 0ffe6dbc..11c11d45 100644
--- a/bin/lessc
+++ b/bin/lessc
@@ -180,10 +180,10 @@ var environment = {
     return buffer.toString('base64');
   },
   mimeLookup: function mimeLookup(filename) {
-    return require('mime').lookup(filename);
+    return require('mime').getType(filename);
   },
   charsetLookup: function charsetLookup(mime) {
-    return require('mime').charsets.lookup(mime);
+    return (/^text\/|^application\/(javascript|json)/).test(mime) ? 'UTF-8' : null;
   },
   getSourceMapGenerator: function getSourceMapGenerator() {
     return require('source-map').SourceMapGenerator;
diff --git a/dist/less.cjs.js b/dist/less.cjs.js
index 41b01742..cfc307e9 100644
--- a/dist/less.cjs.js
+++ b/dist/less.cjs.js
@@ -11,10 +11,10 @@ var environment = {
     return buffer.toString('base64');
   },
   mimeLookup: function mimeLookup(filename) {
-    return require('mime').lookup(filename);
+    return require('mime').getType(filename);
   },
   charsetLookup: function charsetLookup(mime) {
-    return require('mime').charsets.lookup(mime);
+    return (/^text\/|^application\/(javascript|json)/).test(mime) ? 'UTF-8' : null;
   },
   getSourceMapGenerator: function getSourceMapGenerator() {
     return require('source-map').SourceMapGenerator;
diff --git a/lib/less-node/environment.js b/lib/less-node/environment.js
index a9b790c9..a24cf481 100644
--- a/lib/less-node/environment.js
+++ b/lib/less-node/environment.js
@@ -5,10 +5,10 @@ export default {
         return buffer.toString('base64');
     },
     mimeLookup: function (filename) {
-        return require('mime').lookup(filename);
+        return require('mime').getType(filename);
     },
     charsetLookup: function (mime) {
-        return require('mime').charsets.lookup(mime);
+        return (/^text\/|^application\/(javascript|json)/).test(mime) ? 'UTF-8' : null;
     },
     getSourceMapGenerator: function getSourceMapGenerator() {
         return require('source-map').SourceMapGenerator;
diff --git a/package.json b/package.json
index b9887fcf..50599f21 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "errno": "^0.1.1",
     "graceful-fs": "^4.1.2",
     "image-size": "~0.5.0",
-    "mime": "^1.4.1",
+    "mime": "^2.0.0",
     "mkdirp": "^0.5.0",
     "promise": "^7.1.1",
     "request": "^2.83.0",