diff --git a/package.json b/package.json
index e005ff4..2e56721 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "dependencies": {
     "bencode": "^1.0.0",
     "big-integer": "^1.6.23",
-    "bignumber.js": "^4.0.2",
+    "bignumber.js": "^5.0.0",
     "random-words": "0.0.1",
     "sha3": "^1.2.0"
   },