diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index b7df85a..c246497
--- a/package.json
+++ b/package.json
@@ -78,7 +78,7 @@
     "react-app-rewired": "^2.1.6",
     "react-test-renderer": "^16.13.0",
     "source-map-explorer": "^2.4.1",
-    "terser": "^4.6.7",
+    "terser": "^4.8.1",
     "terser-brunch": "^4.0.0",
     "uglifyify": "^5.0.2"
   }
diff --git a/yarn.lock b/yarn.lock
old mode 100755
new mode 100644
index 6f1077a..62ea514
--- a/yarn.lock
+++ b/yarn.lock
@@ -12673,19 +12673,10 @@ terser@^3.7.5:
     source-map "~0.6.1"
     source-map-support "~0.5.10"
 
-terser@^4.1.2, terser@^4.4.3, terser@^4.6.3:
-  version "4.6.6"
-  resolved "https://registry.npm.taobao.org/terser/download/terser-4.6.6.tgz?cache=0&sync_timestamp=1583252322857&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fterser%2Fdownload%2Fterser-4.6.6.tgz#da2382e6cafbdf86205e82fb9a115bd664d54863"
-  integrity sha1-2iOC5sr734YgXoL7mhFb1mTVSGM=
-  dependencies:
-    commander "^2.20.0"
-    source-map "~0.6.1"
-    source-map-support "~0.5.12"
-
-terser@^4.4, terser@^4.6.7:
-  version "4.6.7"
-  resolved "https://registry.npm.taobao.org/terser/download/terser-4.6.7.tgz?cache=0&sync_timestamp=1584455385160&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fterser%2Fdownload%2Fterser-4.6.7.tgz#478d7f9394ec1907f0e488c5f6a6a9a2bad55e72"
-  integrity sha1-R41/k5TsGQfw5IjF9qaporrVXnI=
+terser@^4.1.2, terser@^4.4, terser@^4.4.3, terser@^4.6.3, terser@^4.8.1:
+  version "4.8.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.8.1.tgz#a00e5634562de2239fd404c649051bf6fc21144f"
+  integrity sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==
   dependencies:
     commander "^2.20.0"
     source-map "~0.6.1"