diff --git a/package.json b/package.json
index 370c2b6..2016a03 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "tape": "^4.6.3"
   },
   "dependencies": {
-    "bignumber.js": "^4.0.4",
+    "bignumber.js": "^5.0.0",
     "murmurhash3": "^0.4.0"
   }
 }