diff --git a/package.json b/package.json
index 78c3f27..5d91fd5 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "typedoc-plugin-internal-external": "1.0.10",
     "typedoc-plugin-single-line-tags": "1.0.0",
     "typescript": "3.1.6",
-    "uglify-js": "3.4.9",
+    "uglify-js": "3.13.4",
     "webpack": "4.26.1",
     "webpack-bundle-analyzer": "3.0.3",
     "webpack-cli": "3.1.2",
diff --git a/yarn.lock b/yarn.lock
index bf88a92..326048b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5922,7 +5922,12 @@ typescript@3.1.6, typescript@3.1.x:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.6.tgz#b6543a83cfc8c2befb3f4c8fba6896f5b0c9be68"
   integrity sha512-tDMYfVtvpb96msS1lDX9MEdHrW4yOuZ4Kdc4Him9oU796XldPYF/t2+uKoX0BBa0hXXwDlqYQbXY5Rzjzc5hBA==
 
-uglify-js@3.4.9, uglify-js@^3.1.4:
+uglify-js@3.13.4:
+  version "3.13.4"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.13.4.tgz#592588bb9f47ae03b24916e2471218d914955574"
+  integrity sha512-kv7fCkIXyQIilD5/yQy8O+uagsYIOt5cZvs890W40/e/rvjMSzJw81o9Bg0tkURxzZBROtDQhW2LFjOGoK3RZw==
+
+uglify-js@^3.1.4:
   version "3.4.9"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.4.9.tgz#af02f180c1207d76432e473ed24a28f4a782bae3"
   integrity sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==