diff --git a/Sources/EvmKit/Core/Signature.swift b/Sources/EvmKit/Core/Signature.swift
index ce413e3..d6bb030 100644
--- a/Sources/EvmKit/Core/Signature.swift
+++ b/Sources/EvmKit/Core/Signature.swift
@@ -5,7 +5,7 @@ public class Signature {
     let r: BigUInt
     let s: BigUInt
 
-    init(v: Int, r: BigUInt, s: BigUInt) {
+    public init(v: Int, r: BigUInt, s: BigUInt) {
         self.v = v
         self.r = r
         self.s = s
diff --git a/Sources/EvmKit/Core/TransactionBuilder.swift b/Sources/EvmKit/Core/TransactionBuilder.swift
index e35ac67..d01b71a 100644
--- a/Sources/EvmKit/Core/TransactionBuilder.swift
+++ b/Sources/EvmKit/Core/TransactionBuilder.swift
@@ -1,7 +1,7 @@
 import Foundation
 import HsCryptoKit
 
-class TransactionBuilder {
+public class TransactionBuilder {
     private let chainId: Int
     private let address: Address
 
@@ -42,7 +42,7 @@ class TransactionBuilder {
 }
 
 extension TransactionBuilder {
-    static func encode(rawTransaction: RawTransaction, signature: Signature?, chainId: Int = 1) -> Data {
+    public static func encode(rawTransaction: RawTransaction, signature: Signature?, chainId: Int = 1) -> Data {
         let signatureArray: [Any?] = [
             signature?.v,
             signature?.r,
@@ -77,4 +77,4 @@ extension TransactionBuilder {
             return Data([0x02]) + encodedTransaction
         }
     }
-}
\ No newline at end of file
+}