diff --git a/digdag-ui/package-lock.json b/digdag-ui/package-lock.json
index e3b7a6df3c..9e904d7854 100644
--- a/digdag-ui/package-lock.json
+++ b/digdag-ui/package-lock.json
@@ -11875,9 +11875,9 @@
       "integrity": "sha1-aUmqv7C6GLsVYq5RpDn9DzAYOhc="
     },
     "terser": {
-      "version": "4.4.2",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-4.4.2.tgz",
-      "integrity": "sha512-Uufrsvhj9O1ikwgITGsZ5EZS6qPokUOkCegS7fYOdGTv+OA90vndUbU6PEjr5ePqHfNUbGyMO7xyIZv2MhsALQ==",
+      "version": "4.8.1",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.1.tgz",
+      "integrity": "sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==",
       "dev": true,
       "requires": {
         "commander": "^2.20.0",