diff --git a/package-lock.json b/package-lock.json
index e5f8eea..c8df3f8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2032,12 +2032,6 @@
         }
       }
     },
-    "esprima": {
-      "version": "3.1.3",
-      "resolved": "https://registry.npmjs.org/esprima/-/esprima-3.1.3.tgz",
-      "integrity": "sha1-/cpRzuYTOJXjyI1TXOSdv/YqRjM=",
-      "dev": true
-    },
     "esrecurse": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/esrecurse/-/esrecurse-4.1.0.tgz",
@@ -3872,13 +3866,21 @@
       "dev": true
     },
     "js-yaml": {
-      "version": "3.8.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.8.1.tgz",
-      "integrity": "sha1-eCulAgC+e55ahTcAG3gE2zrQJig=",
+      "version": "3.13.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
+      "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
       "dev": true,
       "requires": {
         "argparse": "^1.0.7",
-        "esprima": "^3.1.1"
+        "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
+        }
       }
     },
     "jsesc": {