diff --git a/package.json b/package.json
index 651ef86..06ef352 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "docco": "^0.8.0",
     "mocha": "^5.0.0",
     "reify": "^0.18.1",
-    "terser": "^3.16.0"
+    "terser": "^4.6.11"
   },
   "license": "MIT",
   "engines": {