diff --git a/package.json b/package.json
index cb41c32..a12b71a 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "test": "make test"
   },
   "dependencies": {
-    "bignum": "^0.11.0"
+    "bignum": "^0.12.5"
   },
   "devDependencies": {
     "mocha": "1.16.0",