diff --git a/boa/Cargo.toml b/boa/Cargo.toml
index 3780f519380..67e77dbb287 100644
--- a/boa/Cargo.toml
+++ b/boa/Cargo.toml
@@ -29,7 +29,7 @@ rand = "0.8.2"
 num-traits = "0.2.14"
 regress = "0.2.0"
 rustc-hash = "1.1.0"
-num-bigint = { version = "0.3.1", features = ["serde"] }
+num-bigint = { version = "0.4.0", features = ["serde"] }
 num-integer = "0.1.44"
 bitflags = "1.2.1"
 indexmap = "1.6.1"