diff --git a/Cargo.toml b/Cargo.toml
index d85ebc5..39500c7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,8 @@ description = "Sway token standard SRC-20 rust sdk"
 
 [dependencies]
 dotenv = "0.15.0"
-fuels = { version = "0.41.1", features = ["fuel-core-lib"] }
+fuels = { version = "0.44", features = ["fuel-core-lib"] }
+serde = "1.0.171"
 
 [dev-dependencies]
 tokio = { version = "1.12", features = ["rt", "macros"] }
diff --git a/contract/Forc.lock b/contract/Forc.lock
index cdcfca1..b5ee27c 100644
--- a/contract/Forc.lock
+++ b/contract/Forc.lock
@@ -1,21 +1,13 @@
 [[package]]
 name = 'FRC20'
 source = 'member'
-dependencies = [
-    'std',
-    'string',
-]
+dependencies = ['std']
 
 [[package]]
 name = 'core'
-source = 'path+from-root-A45E318ED12CBB09'
+source = 'path+from-root-9BFE6D5D0CBDF740'
 
 [[package]]
 name = 'std'
-source = 'git+https://github.com/fuellabs/sway?tag=v0.39.0#7a095280e7e1c0bfbbfc201867896e720aab7209'
+source = 'git+https://github.com/fuellabs/sway?tag=v0.42.1#3b66f8e424bd21e3ba467783b10b36e808cfa6ee'
 dependencies = ['core']
-
-[[package]]
-name = 'string'
-source = 'git+https://github.com/FuelLabs/sway-libs?default-branch#719a86874b81b500b630a349ac0dd5da625b2fe9'
-dependencies = ['std']
diff --git a/contract/Forc.toml b/contract/Forc.toml
index 1acd9ad..ea0115f 100644
--- a/contract/Forc.toml
+++ b/contract/Forc.toml
@@ -5,4 +5,4 @@ license = "Apache-2.0"
 name = "FRC20"
 
 [dependencies]
-string = { git = "https://github.com/FuelLabs/sway-libs"}
\ No newline at end of file
+# string = { git = "https://github.com/FuelLabs/sway-libs"}
\ No newline at end of file
diff --git a/contract/out/debug/FRC20-abi.json b/contract/out/debug/FRC20-abi.json
index 12a1ba5..d16166b 100644
--- a/contract/out/debug/FRC20-abi.json
+++ b/contract/out/debug/FRC20-abi.json
@@ -137,7 +137,7 @@
         "type": 6,
         "typeArguments": null
       },
-      "offset": 3480
+      "offset": 3512
     },
     {
       "name": "NAME",
@@ -146,7 +146,7 @@
         "type": 2,
         "typeArguments": null
       },
-      "offset": 3488
+      "offset": 3520
     },
     {
       "name": "SYMBOL",
@@ -155,7 +155,7 @@
         "type": 3,
         "typeArguments": null
       },
-      "offset": 3520
+      "offset": 3552
     },
     {
       "name": "OWNER",
@@ -164,7 +164,7 @@
         "type": 4,
         "typeArguments": []
       },
-      "offset": 3384
+      "offset": 3416
     }
   ]
 }
\ No newline at end of file
diff --git a/contract/src/main.sw b/contract/src/main.sw
index 6f493f5..58a57de 100644
--- a/contract/src/main.sw
+++ b/contract/src/main.sw
@@ -1,5 +1,5 @@
 contract;
-use string::String;
+// use string::String;
 use std::address::Address;
 use std::constants::ZERO_B256;
 use std::token::mint_to_address;
diff --git a/src/lib.rs b/src/lib.rs
index 925c903..ece2ef2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,11 +3,14 @@ use fuels::{
     prelude::{abigen, Contract, LoadConfiguration, TxParameters},
     types::SizedAsciiString,
 };
+use serde::{Deserialize, Serialize};
 
 abigen!(Contract(
     name = "TokenContract",
     abi = "contract/out/debug/FRC20-abi.json"
 ));
+
+#[derive(Serialize, Deserialize)]
 pub struct DeployTokenConfig {
     pub name: String,
     pub symbol: String,
@@ -45,7 +48,7 @@ pub async fn deploy_token_contract(
 
 pub mod token_abi_calls {
 
-    use fuels::{programs::call_response::FuelCallResponse, types::Address};
+    use fuels::{programs::call_response::FuelCallResponse, types::Address, prelude::TxDependencyExtension};
 
     use super::*;
 
diff --git a/tests/deploy.rs b/tests/deploy.rs
index 33526bf..f7b2373 100644
--- a/tests/deploy.rs
+++ b/tests/deploy.rs
@@ -1,6 +1,6 @@
 use dotenv::dotenv;
-use fuels::prelude::{Provider, WalletUnlocked};
-use src20_sdk::{DeployTokenConfig, deploy_token_contract};
+use fuels::{prelude::Provider, accounts::wallet::WalletUnlocked};
+use src20_sdk::{deploy_token_contract, DeployTokenConfig};
 const RPC: &str = "beta-3.fuel.network";
 #[tokio::test]
 async fn deploy() {
@@ -9,7 +9,7 @@ async fn deploy() {
     let secret = std::env::var("ADMIN").unwrap();
     let wallet =
         WalletUnlocked::new_from_private_key(secret.parse().unwrap(), Some(provider.clone()));
-
+    
     let configs: Vec<DeployTokenConfig> = vec![
         DeployTokenConfig {
             name: String::from("Bitcoin"),