diff --git a/Cargo.toml b/Cargo.toml
index cf7c08d..87a565e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uniswap-sdk-core"
-version = "4.0.0-rc"
+version = "4.0.0-rc1"
 edition = "2021"
 authors = ["malik <aremumalik05@gmail.com>", "Shuhui Luo <twitter.com/aureliano_law>"]
 description = "The Uniswap SDK Core in Rust provides essential functionality for interacting with the Uniswap decentralized exchange"
diff --git a/src/lib.rs b/src/lib.rs
index 6d79878..1e1b4b8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -49,6 +49,7 @@ pub mod prelude {
     pub use alloc::{string::String, vec::Vec};
     pub use alloy_primitives::{map::rustc_hash::FxHashMap, Address, Bytes, B256, U256};
     pub use bnum;
+    pub use fastnum;
     pub use num_integer::Integer;
 
     pub type BigInt = fastnum::I512;