diff --git a/package.json b/package.json
index fb39ed91..fab22f13 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
   "license": "MIT",
   "dependencies": {
     "async": "2.1.4",
-    "bignum": "^0.12.5",
+    "bignum": "^0.13.1",
     "bluebird": "3.4.7",
     "body-parser": "^1.16.0",
     "bufferutil": "^1.3.0",
@@ -21,7 +21,7 @@
     "cors": "^2.8.1",
     "crypto": "0.0.3",
     "debug": "2.5.1",
-    "express": "4.14.0",
+    "express": "4.22.0",
     "jsonwebtoken": "^7.2.1",
     "minimist": "1.2.0",
     "moment": "2.17.1",