diff --git a/package-lock.json b/package-lock.json
index 4910850..bff6d54 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -143,6 +143,28 @@
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@@ -254,6 +282,12 @@
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@@ -261,13 +295,17 @@
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-      "integrity": "sha1-Spc/Y1uRkPcV0QmH1cAP0oFevj0=",
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+        "inflight": "^1.0.4",
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@@ -277,9 +315,9 @@
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@@ -288,11 +326,27 @@
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+      "integrity": "sha1-k0EP0hsAlzUVH4howvJx80J+I/0=",
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       "integrity": "sha1-wkOZUUVbs5kT2vKBN28VMOEErfM="
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+      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+      "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
+      "dev": true,
+      "requires": {
+        "once": "^1.3.0",
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@@ -320,30 +374,6 @@
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@@ -362,20 +392,13 @@
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-      "integrity": "sha1-J12O2qxPG7MyZHIInnlJyDlGmd0=",
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
       "dev": true,
       "requires": {
-        "lru-cache": "2",
-        "sigmund": "~1.0.0"
+        "brace-expansion": "^1.1.7"
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@@ -394,27 +417,28 @@
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-      "resolved": "http://registry.npmjs.org/mocha/-/mocha-2.5.3.tgz",
-      "integrity": "sha1-FhvlvetJZ3HrmzV0UFC2IrWu/Fg=",
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-5.2.0.tgz",
+      "integrity": "sha512-2IUgKDhc3J7Uug+FxMXuqIyYzH7gJjXECKe/w43IGgQHTSj3InJi+yAA7T24L9bQMRKiUEHxEX37G5JpVUGLcQ==",
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-        "commander": "2.3.0",
-        "debug": "2.2.0",
-        "diff": "1.4.0",
-        "escape-string-regexp": "1.0.2",
-        "glob": "3.2.11",
-        "growl": "1.9.2",
-        "jade": "0.26.3",
+        "browser-stdout": "1.3.1",
+        "commander": "2.15.1",
+        "debug": "3.1.0",
+        "diff": "3.5.0",
+        "escape-string-regexp": "1.0.5",
+        "glob": "7.1.2",
+        "growl": "1.10.5",
+        "he": "1.1.1",
+        "minimatch": "3.0.4",
         "mkdirp": "0.5.1",
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-        "to-iso-string": "0.0.2"
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-      "resolved": "http://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
-      "integrity": "sha1-nNE8A62/8ltl7/3nzoZO6VIBcJg=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
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@@ -1556,6 +1580,21 @@
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+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "dev": true,
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
+      "dev": true
+    },
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@@ -1568,12 +1607,6 @@
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-    "sigmund": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
-      "integrity": "sha1-P/IfGYytIXX587eBhT/ZTQ0ZtZA=",
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@@ -1581,10 +1614,13 @@
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-      "integrity": "sha1-/x7R5hFp0Gs88tWI4YixjYhH4X4=",
-      "dev": true
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.4.0.tgz",
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+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
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@@ -1592,12 +1628,6 @@
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@@ -1609,6 +1639,12 @@
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       "dev": true
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
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   }
 }
diff --git a/package.json b/package.json
index 9c52b6d..5ac1b83 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
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     "chai": "^4.2.0",
     "chai-immutable": "^2.0.0-rc.2",
-    "mocha": "^2.5.3",
+    "mocha": "^5.2.0",
     "nyc": "^13.1.0"
   },
   "dependencies": {