diff --git a/package.json b/package.json
index bfa23f89..96b9811f 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   "homepage": "https://github.com/indutny/bcoin",
   "dependencies": {
     "async": "^0.8.0",
-    "bn.js": "^0.10.0",
+    "bn.js": "^4.5.0",
     "elliptic": "^3.0.3",
     "hash.js": "^1.0.3",
     "inherits": "^2.0.1"