diff --git a/package-lock.json b/package-lock.json
index 66b7a87..5c8dd7c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -507,13 +507,21 @@
       "dev": true
     },
     "js-yaml": {
-      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.6.0.tgz",
-      "integrity": "sha1-O3vzJW3VmPYPi2+Op1UUpYWiTcY=",
+      "version": "3.13.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+      "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
       "dev": true,
       "requires": {
-        "argparse": "1.0.9",
-        "esprima": "2.7.3"
+        "argparse": "^1.0.7",
+        "esprima": "^4.0.0"
+      },
+      "dependencies": {
+        "esprima": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
+          "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
+          "dev": true
+        }
       }
     },
     "load-grunt-tasks": {
diff --git a/package.json b/package.json
index ec2e36e..24ed005 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "grunt-contrib-clean": "1.0.0",
     "grunt-open": "0.2.3",
     "grunt-shell": "1.3.0",
-    "js-yaml": "3.6.0",
+    "js-yaml": "3.13.1",
     "load-grunt-tasks": "3.5.0"
   }
 }