diff --git a/package.json b/package.json
index 97fa2b33..2e96a57b 100644
--- a/package.json
+++ b/package.json
@@ -132,7 +132,7 @@
     "react-dom": "16.0.0",
     "standard": "9.0.2",
     "taskr": "1.1.0",
-    "uglifyjs-webpack-plugin": "^1.0.0-beta.3",
+    "uglifyjs-webpack-plugin": "^1.1.1",
     "wd": "1.4.1"
   },
   "peerDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 656ca989..f5ba9ff8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1343,9 +1343,9 @@ builtins@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/builtins/-/builtins-1.0.3.tgz#cb94faeb61c8696451db36534e1422f94f0aee88"
 
-cacache@^9.2.9:
-  version "9.3.0"
-  resolved "https://registry.yarnpkg.com/cacache/-/cacache-9.3.0.tgz#9cd58f2dd0b8c8cacf685b7067b416d6d3cf9db1"
+cacache@^10.0.0:
+  version "10.0.1"
+  resolved "https://registry.yarnpkg.com/cacache/-/cacache-10.0.1.tgz#3e05f6e616117d9b54665b1b20c8aeb93ea5d36f"
   dependencies:
     bluebird "^3.5.0"
     chownr "^1.0.1"
@@ -1357,7 +1357,7 @@ cacache@^9.2.9:
     move-concurrently "^1.0.1"
     promise-inflight "^1.0.1"
     rimraf "^2.6.1"
-    ssri "^4.1.6"
+    ssri "^5.0.0"
     unique-filename "^1.1.0"
     y18n "^3.2.1"
 
@@ -6055,12 +6055,18 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
-ssri@^4.1.2, ssri@^4.1.6:
+ssri@^4.1.2:
   version "4.1.6"
   resolved "https://registry.yarnpkg.com/ssri/-/ssri-4.1.6.tgz#0cb49b6ac84457e7bdd466cb730c3cb623e9a25b"
   dependencies:
     safe-buffer "^5.1.0"
 
+ssri@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/ssri/-/ssri-5.0.0.tgz#13c19390b606c821f2a10d02b351c1729b94d8cf"
+  dependencies:
+    safe-buffer "^5.1.0"
+
 stackframe@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/stackframe/-/stackframe-0.3.1.tgz#33aa84f1177a5548c8935533cbfeb3420975f5a4"
@@ -6500,9 +6506,9 @@ ua-parser-js@^0.7.9:
   version "0.7.17"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.17.tgz#e9ec5f9498b9ec910e7ae3ac626a805c4d09ecac"
 
-uglify-es@^3.0.24:
-  version "3.1.5"
-  resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.1.5.tgz#63bae0fd4f9feeda417fee7c0ff685a673819683"
+uglify-es@^3.1.3:
+  version "3.1.10"
+  resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.1.10.tgz#f1840c3b52771d17555a02ce158cf46f689384bd"
   dependencies:
     commander "~2.11.0"
     source-map "~0.6.1"
@@ -6528,15 +6534,15 @@ uglifyjs-webpack-plugin@^0.4.6:
     uglify-js "^2.8.29"
     webpack-sources "^1.0.1"
 
-uglifyjs-webpack-plugin@^1.0.0-beta.3:
-  version "1.0.0-beta.3"
-  resolved "https://registry.yarnpkg.com/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.0.0-beta.3.tgz#0715c2ee70bd927685c7cbccda678c6ceab6fc0f"
+uglifyjs-webpack-plugin@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.1.1.tgz#6167c5aae218ee8109de8920bb769b8acbc55d03"
   dependencies:
-    cacache "^9.2.9"
+    cacache "^10.0.0"
     find-cache-dir "^1.0.0"
     schema-utils "^0.3.0"
-    source-map "^0.5.6"
-    uglify-es "^3.0.24"
+    source-map "^0.6.1"
+    uglify-es "^3.1.3"
     webpack-sources "^1.0.1"
     worker-farm "^1.4.1"