diff --git a/package-lock.json b/package-lock.json
index 59c33d1..6611214 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -467,6 +467,12 @@
       "resolved": "https://registry.npmjs.org/any-promise/-/any-promise-1.3.0.tgz",
       "integrity": "sha1-q8av7tzqUugJzcA3au0845Y10X8="
     },
+    "arg": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/arg/-/arg-4.1.0.tgz",
+      "integrity": "sha512-ZWc51jO3qegGkVh8Hwpv636EkbesNV5ZNQPCtRa+0qytRYPEs9IYT9qITY9buezqUH5uqyzlWLcufrzU2rffdg==",
+      "dev": true
+    },
     "argparse": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
@@ -2973,6 +2979,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -3297,7 +3304,8 @@
         "is-buffer": {
           "version": "1.1.6",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "is-builtin-module": {
           "version": "1.0.0",
@@ -3381,6 +3389,7 @@
           "version": "3.2.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "is-buffer": "^1.1.5"
           }
@@ -3427,7 +3436,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "lru-cache": {
           "version": "4.1.3",
@@ -3693,7 +3703,8 @@
         "repeat-string": {
           "version": "1.6.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "require-directory": {
           "version": "2.1.1",
@@ -4864,9 +4875,9 @@
       }
     },
     "source-map-support": {
-      "version": "0.5.9",
-      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.9.tgz",
-      "integrity": "sha512-gR6Rw4MvUlYy83vP0vxoVNzM6t8MUXqNuRsuBmBHQDu1Fh6X015FrLdgoDKcNdkwGubozq0P4N0Q37UyFVr1EA==",
+      "version": "0.5.10",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.10.tgz",
+      "integrity": "sha512-YfQ3tQFTK/yzlGJuX8pTwa4tifQj4QS2Mj7UegOu8jAz59MqIiMGPXxQhVQiIMNzayuUSF/jEuVnfFF5JqybmQ==",
       "dev": true,
       "requires": {
         "buffer-from": "^1.0.0",
@@ -5186,19 +5197,16 @@
       "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM="
     },
     "ts-node": {
-      "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-7.0.1.tgz",
-      "integrity": "sha512-BVwVbPJRspzNh2yfslyT1PSbl5uIk03EZlb493RKHN4qej/D06n1cEhjlOJG69oFsE7OT8XjpTUcYf6pKTLMhw==",
+      "version": "8.0.2",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-8.0.2.tgz",
+      "integrity": "sha512-MosTrinKmaAcWgO8tqMjMJB22h+sp3Rd1i4fdoWY4mhBDekOwIAKI/bzmRi7IcbCmjquccYg2gcF6NBkLgr0Tw==",
       "dev": true,
       "requires": {
-        "arrify": "^1.0.0",
-        "buffer-from": "^1.1.0",
+        "arg": "^4.1.0",
         "diff": "^3.1.0",
         "make-error": "^1.1.1",
-        "minimist": "^1.2.0",
-        "mkdirp": "^0.5.1",
         "source-map-support": "^0.5.6",
-        "yn": "^2.0.0"
+        "yn": "^3.0.0"
       }
     },
     "tslib": {
@@ -5465,9 +5473,9 @@
       }
     },
     "yn": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
-      "integrity": "sha1-5a2ryKz0CPY4X8dklWhMiOavaJo=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.0.0.tgz",
+      "integrity": "sha512-+Wo/p5VRfxUgBUGy2j/6KX2mj9AYJWOHuhMjMcbBFc3y54o9/4buK1ksBvuiK01C3kby8DH9lSmJdSxw+4G/2Q==",
       "dev": true
     }
   }
diff --git a/package.json b/package.json
index 3cc7da8..f0becd8 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "mocha": "^5.2.0",
     "nyc": "^13.1.0",
     "prettier": "^1.15.3",
-    "ts-node": "^7.0.1",
+    "ts-node": "^8.0.2",
     "tslint": "^5.11.0",
     "tslint-config-prettier": "^1.17.0",
     "typescript": "^3.2.2"