diff --git a/package.json b/package.json
index d9d7e04..5d59855 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   },
   "dependencies": {
     "body-parser": "^1.15.1",
-    "deep-extend": "^0.4.1",
+    "deep-extend": "^0.5.1",
     "express": "^4.13.4",
     "js2xmlparser": "^1.0.0",
     "moment": "^2.13.0",
diff --git a/yarn.lock b/yarn.lock
index a66e31a..854db80 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -352,10 +352,10 @@ deep-equal@~1.1.1:
     object-keys "^1.1.1"
     regexp.prototype.flags "^1.2.0"
 
-deep-extend@^0.4.1:
-  version "0.4.2"
-  resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.2.tgz#48b699c27e334bf89f10892be432f6e4c7d34a7f"
-  integrity sha1-SLaZwn4zS/ifEIkr5DL25MfTSn8=
+deep-extend@^0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.5.1.tgz#b894a9dd90d3023fbf1c55a394fb858eb2066f1f"
+  integrity sha512-N8vBdOa+DF7zkRrDCsaOXoCs/E2fJfx9B9MrKnnSiHNh4ws7eSys6YQE4KvT1cecKmOASYQBhbKjeuDD9lT81w==
 
 define-properties@^1.1.2, define-properties@^1.1.3:
   version "1.1.3"