diff --git a/package-lock.json b/package-lock.json
index 82b155ee..b46510ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13879,9 +13879,9 @@
       }
     },
     "terser": {
-      "version": "3.17.0",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-3.17.0.tgz",
-      "integrity": "sha512-/FQzzPJmCpjAH9Xvk2paiWrFq+5M6aVOf+2KRbwhByISDX/EujxsK+BAvrhb6H+2rtrLCHK9N01wO014vrIwVQ==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.0.0.tgz",
+      "integrity": "sha512-dOapGTU0hETFl1tCo4t56FN+2jffoKyER9qBGoUFyZ6y7WLoKT0bF+lAYi6B6YsILcGF3q1C2FBh8QcKSCgkgA==",
       "dev": true,
       "requires": {
         "commander": "^2.19.0",
@@ -13914,18 +13914,19 @@
       }
     },
     "terser-webpack-plugin": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.2.4.tgz",
-      "integrity": "sha512-64IiILNQlACWZLzFlpzNaG0bpQ4ytaB7fwOsbpsdIV70AfLUmIGGeuKL0YV2WmtcrURjE2aOvHD4/lrFV3Rg+Q==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.3.0.tgz",
+      "integrity": "sha512-W2YWmxPjjkUcOWa4pBEv4OP4er1aeQJlSo2UhtCFQCuRXEHjOFscO8VyWHj9JLlA0RzQb8Y2/Ta78XZvT54uGg==",
       "dev": true,
       "requires": {
         "cacache": "^11.3.2",
         "find-cache-dir": "^2.0.0",
         "is-wsl": "^1.1.0",
+        "loader-utils": "^1.2.3",
         "schema-utils": "^1.0.0",
         "serialize-javascript": "^1.7.0",
         "source-map": "^0.6.1",
-        "terser": "^3.17.0",
+        "terser": "^4.0.0",
         "webpack-sources": "^1.3.0",
         "worker-farm": "^1.7.0"
       },
diff --git a/package.json b/package.json
index 5744bb22..242cd2d3 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "script-ext-html-webpack-plugin": "2.1.3",
     "source-map-loader": "0.2.4",
     "style-loader": "0.23.1",
-    "terser-webpack-plugin": "1.2.4",
+    "terser-webpack-plugin": "1.3.0",
     "travis-size-report": "1.0.1",
     "ts-loader": "6.0.1",
     "tslint": "5.16.0",