diff --git a/index.js b/index.js
index d23ba83..6c8186e 100644
--- a/index.js
+++ b/index.js
@@ -2,7 +2,6 @@
 
 var walkSync = require('walk-sync');
 var Plugin = require('broccoli-plugin');
-var UglifyJS = require('uglify-es');
 var path = require('path');
 var fs = require('fs');
 var defaults = require('lodash.defaultsdeep');
diff --git a/lib/process-file.js b/lib/process-file.js
index 36845d0..8c0a067 100644
--- a/lib/process-file.js
+++ b/lib/process-file.js
@@ -8,7 +8,7 @@ var path = require('path');
 var srcURL = require('source-map-url');
 
 var Promise = require('rsvp').Promise;
-var UglifyJS = require('uglify-es');
+var terser = require('terser');
 
 
 module.exports = function processFile(inFile, outFile, relativePath, outDir, silent, _options) {
@@ -44,7 +44,7 @@ module.exports = function processFile(inFile, outFile, relativePath, outDir, sil
 
   var start = new Date();
   debug('[starting]: %s %dKB', relativePath, (src.length / 1000));
-  var result = UglifyJS.minify(src, options);
+  var result = terser.minify(src, options);
   var end = new Date();
   var total = end - start;
   if (total > 20000 && !silent) {
diff --git a/package.json b/package.json
index 65ce0c6..26d1635 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "mkdirp": "^0.5.0",
     "source-map-url": "^0.4.0",
     "symlink-or-copy": "^1.0.1",
-    "uglify-es": "^3.1.3",
+    "terser": "^3.7.5",
     "walk-sync": "^0.3.2",
     "workerpool": "^2.3.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 0f45a2b..cd6b8ad 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -548,10 +548,14 @@ combined-stream@^1.0.5, combined-stream@~1.0.5:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@^2.5.0, commander@~2.11.0:
+commander@^2.5.0:
   version "2.11.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.11.0.tgz#157152fd1e7a6c8d98a5b715cf376df928004563"
 
+commander@~2.14.1:
+  version "2.14.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.14.1.tgz#2235123e37af8ca3c65df45b026dbd357b01b9aa"
+
 concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
@@ -2440,6 +2444,10 @@ source-map@~0.2.0:
   dependencies:
     amdefine ">=0.0.4"
 
+source-map@~0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+
 spdx-correct@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-1.0.2.tgz#4b3073d933ff51f3912f03ac5519498a4150db40"
@@ -2587,6 +2595,13 @@ tar@^2.2.1:
     fstream "^1.0.2"
     inherits "2"
 
+terser@^3.7.5:
+  version "3.7.5"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-3.7.5.tgz#b18090210794c79a5774bc1f0ebe80fb877a31bd"
+  dependencies:
+    commander "~2.14.1"
+    source-map "~0.6.1"
+
 test-exclude@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.1.1.tgz#4d84964b0966b0087ecc334a2ce002d3d9341e26"
@@ -2645,13 +2660,6 @@ type-check@~0.3.2:
   dependencies:
     prelude-ls "~1.1.2"
 
-uglify-es@^3.1.3:
-  version "3.1.3"
-  resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.1.3.tgz#a21eeb149cb120a1f8302563689e19496550780b"
-  dependencies:
-    commander "~2.11.0"
-    source-map "~0.5.1"
-
 uglify-js@^2.6:
   version "2.8.29"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.8.29.tgz#29c5733148057bb4e1f75df35b7a9cb72e6a59dd"