diff --git a/package.json b/package.json
index 86c105c..d308abe 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "istanbul": "0.4.5",
     "it-each": "0.4.0",
     "jsdoc": "3.5.5",
-    "mocha": "5.0.3"
+    "mocha": "5.2.0"
   },
   "dependencies": {
     "chai": "~4.1.0",
diff --git a/yarn.lock b/yarn.lock
index ce5eb55..76f4524 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -290,9 +290,9 @@ combined-stream@1.0.6, combined-stream@~1.0.5:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@2.11.0:
-  version "2.11.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.11.0.tgz#157152fd1e7a6c8d98a5b715cf376df928004563"
+commander@2.15.1:
+  version "2.15.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
 
 concat-map@0.0.1:
   version "0.0.1"
@@ -626,11 +626,7 @@ graceful-fs@^4.1.2, graceful-fs@^4.1.9:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
-growl@1.10.3:
-  version "1.10.3"
-  resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.3.tgz#1926ba90cf3edfe2adb4927f5880bc22c66c790f"
-
-"growl@~> 1.10.0":
+growl@1.10.5, "growl@~> 1.10.0":
   version "1.10.5"
   resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
 
@@ -665,10 +661,6 @@ has-flag@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-1.0.0.tgz#9d9e793165ce017a00f00418c43f942a7b1d11fa"
 
-has-flag@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"
-
 has-flag@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
@@ -936,7 +928,7 @@ mimic-fn@^1.0.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.2.0.tgz#820c86a39334640e99516928bd03fca88057d022"
 
-"minimatch@2 || 3", minimatch@^3.0.4:
+"minimatch@2 || 3", minimatch@3.0.4, minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
   dependencies:
@@ -960,20 +952,21 @@ mkdirp@0.5.1, mkdirp@0.5.x, mkdirp@^0.5.1, mkdirp@~0.5.1:
   dependencies:
     minimist "0.0.8"
 
-mocha@5.0.3:
-  version "5.0.3"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.0.3.tgz#0a95a6ddea9073239851a3a26ffc9c8d679c757a"
+mocha@5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.2.0.tgz#6d8ae508f59167f940f2b5b3c4a612ae50c90ae6"
   dependencies:
     browser-stdout "1.3.1"
-    commander "2.11.0"
+    commander "2.15.1"
     debug "3.1.0"
     diff "3.5.0"
     escape-string-regexp "1.0.5"
     glob "7.1.2"
-    growl "1.10.3"
+    growl "1.10.5"
     he "1.1.1"
+    minimatch "3.0.4"
     mkdirp "0.5.1"
-    supports-color "4.4.0"
+    supports-color "5.4.0"
 
 moment@2.20.1:
   version "2.20.1"
@@ -1279,11 +1272,11 @@ strip-json-comments@^2.0.1, strip-json-comments@~2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
 
-supports-color@4.4.0:
-  version "4.4.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.4.0.tgz#883f7ddabc165142b2a61427f3352ded195d1a3e"
+supports-color@5.4.0, supports-color@^5.3.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
   dependencies:
-    has-flag "^2.0.0"
+    has-flag "^3.0.0"
 
 supports-color@^2.0.0:
   version "2.0.0"
@@ -1295,12 +1288,6 @@ supports-color@^3.1.0:
   dependencies:
     has-flag "^1.0.0"
 
-supports-color@^5.3.0:
-  version "5.4.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
-  dependencies:
-    has-flag "^3.0.0"
-
 table@^4.0.3:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/table/-/table-4.0.3.tgz#00b5e2b602f1794b9acaf9ca908a76386a7813bc"