diff --git a/package.json b/package.json
index 0c064a3..0d7bff0 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
   },
   "devDependencies": {
     "jshint": "2.9.5",
-    "mocha": "4.0.1",
-    "should": "13.1.0"
+    "should": "13.1.2",
+    "mocha": "4.0.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index b820beb..32bbceb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1612,9 +1612,9 @@ should-util@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/should-util/-/should-util-1.0.0.tgz#c98cda374aa6b190df8ba87c9889c2b4db620063"
 
-should@13.1.0:
-  version "13.1.0"
-  resolved "https://registry.yarnpkg.com/should/-/should-13.1.0.tgz#0b7be3abf5ebf7c7e116935753918a40660de51e"
+should@13.1.2:
+  version "13.1.2"
+  resolved "https://registry.yarnpkg.com/should/-/should-13.1.2.tgz#46e1335672d0bc5e16146b35947c995a3e5c7b15"
   dependencies:
     should-equal "^2.0.0"
     should-format "^3.0.3"