diff --git a/package.json b/package.json
index 2af0e54..2f5bea6 100644
--- a/package.json
+++ b/package.json
@@ -59,6 +59,6 @@
     "webworkify": "^1.0.1"
   },
   "optionalDependencies": {
-    "bignum": "^0.9.0"
+    "bignum": "^0.11.0"
   }
 }