diff --git a/package-lock.json b/package-lock.json
index 01c7a93..02a7d98 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -131,6 +131,15 @@
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-          "integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
-          "dev": true,
-          "requires": {
-            "color-convert": "1.9.1"
-          }
-        },
-        "chalk": {
-          "version": "2.3.0",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.0.tgz",
-          "integrity": "sha512-Az5zJR2CBujap2rqXGaJKaPHyJ0IrUimvYNX+ncCy8PJP4ltOGTrHUIo097ZaL2zMeKYpiCdqDvS6zdrTFok3Q==",
-          "dev": true,
-          "requires": {
-            "ansi-styles": "3.2.0",
-            "escape-string-regexp": "1.0.5",
-            "supports-color": "4.5.0"
-          }
-        },
-        "has-flag": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-2.0.0.tgz",
-          "integrity": "sha1-6CB68cx7MNRGzHC3NLXovhj4jVE=",
-          "dev": true
-        },
         "minimist": {
           "version": "1.2.0",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
           "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
           "dev": true
-        },
-        "supports-color": {
-          "version": "4.5.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.5.0.tgz",
-          "integrity": "sha1-vnoN5ITexcXN34s9WRJQRJEvY1s=",
-          "dev": true,
-          "requires": {
-            "has-flag": "2.0.0"
-          }
         }
       }
     },
-    "tsconfig": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/tsconfig/-/tsconfig-6.0.0.tgz",
-      "integrity": "sha1-aw6DdgA9evGGT434+J3QBZ/80DI=",
-      "dev": true,
-      "requires": {
-        "strip-bom": "3.0.0",
-        "strip-json-comments": "2.0.1"
-      }
-    },
     "tslib": {
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.0.tgz",
@@ -1745,29 +1685,21 @@
       "dev": true,
       "requires": {
         "babel-code-frame": "6.26.0",
-        "colors": "1.1.2",
-        "commander": "2.9.0",
+        "colors": "1.2.1",
+        "commander": "2.15.0",
         "diff": "3.2.0",
-        "glob": "7.1.1",
+        "glob": "7.1.2",
         "minimatch": "3.0.4",
         "resolve": "1.5.0",
         "semver": "5.5.0",
         "tslib": "1.9.0",
-        "tsutils": "2.19.1"
-      },
-      "dependencies": {
-        "colors": {
-          "version": "1.1.2",
-          "resolved": "https://registry.npmjs.org/colors/-/colors-1.1.2.tgz",
-          "integrity": "sha1-FopHAXVran9RoSzgyXv6KMCE7WM=",
-          "dev": true
-        }
+        "tsutils": "2.22.2"
       }
     },
     "tsutils": {
-      "version": "2.19.1",
-      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-2.19.1.tgz",
-      "integrity": "sha512-1B3z4H4HddgzWptqLzwrJloDEsyBt8DvZhnFO14k7A4RsQL/UhEfQjD4hpcY5NpF3veBkjJhQJ8Bl7Xp96cN+A==",
+      "version": "2.22.2",
+      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-2.22.2.tgz",
+      "integrity": "sha512-u06FUSulCJ+Y8a2ftuqZN6kIGqdP2yJjUPEngXqmdPND4UQfb04igcotH+dw+IFr417yP6muCLE8/5/Qlfnx0w==",
       "dev": true,
       "requires": {
         "tslib": "1.9.0"
@@ -1828,12 +1760,6 @@
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
       "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
     },
-    "user-home": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/user-home/-/user-home-1.1.1.tgz",
-      "integrity": "sha1-K1viOjK2Onyd640PKNSFcko98ZA=",
-      "dev": true
-    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -1845,15 +1771,6 @@
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.2.1.tgz",
       "integrity": "sha512-jZnMwlb9Iku/O3smGWvZhauCf6cvvpKi4BKRiliS3cxnI+Gz9j5MEpTz2UFuXiKPJocb7gnsLHwiS05ige5BEA=="
     },
-    "v8flags": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-2.1.1.tgz",
-      "integrity": "sha1-qrGh+jDUX4jdMhFIh1rALAtV5bQ=",
-      "dev": true,
-      "requires": {
-        "user-home": "1.1.1"
-      }
-    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
diff --git a/package.json b/package.json
index 5b15e15..ff02319 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "prepublish": "npm run build",
     "build": "tsc",
     "test": "npm run lint && npm run mocha",
-    "mocha": "mocha --compilers ts:ts-node/register --require scripts/test-helper.js --recursive --bail tests/**/*.test.ts tests/*.test.ts",
+    "mocha": "mocha --require scripts/test-helper.js --recursive --bail tests/**/*.test.ts tests/*.test.ts",
     "lint": "tslint src/**/*.ts --type-check --project tsconfig.json"
   },
   "engines": {
@@ -49,10 +49,10 @@
     "@types/serve-index": "1.7.29",
     "chai": "4.1.2",
     "chai-as-promised": "7.1.1",
-    "mocha": "3.4.2",
+    "mocha": "5.0.4",
     "node-fetch": "2.1.1",
     "supertest": "3.0.0",
-    "ts-node": "3.2.0",
+    "ts-node": "5.0.1",
     "tslint": "5.5.0",
     "typescript": "2.2.1"
   }
diff --git a/scripts/test-helper.js b/scripts/test-helper.js
index 8cfab6a..1375eb5 100644
--- a/scripts/test-helper.js
+++ b/scripts/test-helper.js
@@ -1,3 +1,5 @@
+require('ts-node/register');
+
 const chai = require('chai');
 const chaiAsPromised = require('chai-as-promised');