diff --git a/package.json b/package.json
index b2e184a..d8c2f63 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "license": "MIT",
   "devDependencies": {
     "rollup": "^1.20.3",
-    "terser": "^4.2.1",
+    "terser": "^5.3.1",
     "fs-extra": "^8.1.0"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 916f0a1..b6e338c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -70,10 +70,10 @@ source-map@^0.6.0, source-map@~0.6.1:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
 
-terser@^4.2.1:
-  version "4.2.1"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-4.2.1.tgz#1052cfe17576c66e7bc70fcc7119f22b155bdac1"
-  integrity sha512-cGbc5utAcX4a9+2GGVX4DsenG6v0x3glnDi5hx8816X1McEAwPlPgRtXPJzSBsbpILxZ8MQMT0KvArLuE0HP5A==
+terser@^5.3.1:
+  version "5.3.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.3.1.tgz#f50fe20ab48b15234fe9bdd86b10148ad5fca787"
+  integrity sha512-yD80f4hdwCWTH5mojzxe1q8bN1oJbsK/vfJGLcPZM/fl+/jItIVNKhFIHqqR71OipFWMLgj3Kc+GIp6CeIqfnA==
   dependencies:
     commander "^2.20.0"
     source-map "~0.6.1"