diff --git a/package-lock.json b/package-lock.json
index 25d2037..1f7bae8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -422,9 +422,9 @@
             "dev": true
         },
         "grunt-contrib-uglify": {
-            "version": "4.0.1",
-            "resolved": "https://registry.npmjs.org/grunt-contrib-uglify/-/grunt-contrib-uglify-4.0.1.tgz",
-            "integrity": "sha512-dwf8/+4uW1+7pH72WButOEnzErPGmtUvc8p08B0eQS/6ON0WdeQu0+WFeafaPTbbY1GqtS25lsHWaDeiTQNWPg==",
+            "version": "5.0.0",
+            "resolved": "https://registry.npmjs.org/grunt-contrib-uglify/-/grunt-contrib-uglify-5.0.0.tgz",
+            "integrity": "sha512-rIFFPJMWKnh6oxDe2b810Ysg5SKoiI0u/FvuvAVpvJ7VHILkKtGqA4jgJ1JWruWQ+1m5FtB1lVSK81YyzIgDUw==",
             "dev": true,
             "requires": {
                 "chalk": "^2.4.1",
diff --git a/package.json b/package.json
index 6d493f5..a2fe622 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "devDependencies": {
         "grunt": "^1.0",
         "grunt-check-modules": "^1.0.0",
-        "grunt-contrib-uglify": "^4.0",
+        "grunt-contrib-uglify": "^5.0",
         "grunt-contrib-watch": "^1.1",
         "grunt-jasmine-nodejs": "^1.6",
         "jasmine": "^3.4.0",