diff --git a/Cargo.toml b/Cargo.toml
index ac4bc94..09c685a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ either = "1.6.1"
 
 [dependencies.num-bigint]
 optional = true
-version = "0.4.3"
+version = "0.4.6"
 features = ["rand"]
 
 [features]