diff --git a/package-lock.json b/package-lock.json
index 8471aa5..681bba0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -387,6 +387,12 @@
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@@ -2944,6 +3088,12 @@
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@@ -3566,6 +3725,15 @@
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@@ -5028,6 +5228,18 @@
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@@ -5091,18 +5313,41 @@
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@@ -5197,6 +5442,12 @@
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@@ -5845,12 +6096,24 @@
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@@ -5878,6 +6141,16 @@
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@@ -7199,6 +7478,48 @@
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+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
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+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
+          "requires": {
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@@ -7307,12 +7675,124 @@
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       "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
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+    "yargs": {
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+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.5.tgz",
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+        "decamelize": "^1.2.0",
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+        "require-main-filename": "^1.0.1",
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+          "requires": {
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+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
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+        "yargs-parser": {
+          "version": "11.1.1",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-11.1.1.tgz",
+          "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
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       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
@@ -7321,6 +7801,17 @@
       "requires": {
         "camelcase": "^4.1.0"
       }
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+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.5.0.tgz",
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+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.11",
+        "yargs": "^12.0.5"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index f03ee06..8c3f42d 100644
--- a/package.json
+++ b/package.json
@@ -49,7 +49,7 @@
     "coveralls": "^3.0.2",
     "elint": "^1.10.0-alpha.1",
     "elint-preset-kw": "^1.5.0",
-    "mocha": "^5.2.0",
+    "mocha": "^6.0.0",
     "nyc": "^13.1.0"
   },
   "dependencies": {