diff --git a/src/lib.rs b/src/lib.rs
index 2bf3129..7b900d2 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,11 +1,8 @@
 // Find all our documentation at https://docs.near.org
-use near_sdk::borsh::{BorshDeserialize, BorshSerialize};
-use near_sdk::json_types::U128;
-use near_sdk::serde::{Deserialize, Serialize};
 use near_sdk::{
-    assert_one_yocto, env, log, near, near_bindgen, require, AccountId, PanicOnDefault,
+    assert_one_yocto, env, json_types::U128, log, near, near_bindgen, require, AccountId,
+    PanicOnDefault,
 };
-use schemars::JsonSchema;
 use uint::construct_uint;
 
 construct_uint! {
@@ -13,8 +10,7 @@ construct_uint! {
     pub struct U256(4);
 }
 
-#[derive(Deserialize, Serialize, JsonSchema)]
-#[serde(crate = "near_sdk::serde")]
+#[near(serializers = [json, borsh])]
 pub struct BasicReturnObject {
     pub greeting: String,
     pub number: u8,
@@ -30,8 +26,8 @@ pub(crate) fn proportional(amount: u128, numerator: u128, denominator: u128) ->
 }
 
 // Define the contract structure
-#[near_bindgen]
-#[derive(BorshDeserialize, BorshSerialize, PanicOnDefault)]
+#[near(contract_state)]
+#[derive(PanicOnDefault)]
 pub struct NearTutorialContract {
     greeting: String,
 }
@@ -155,10 +151,7 @@ impl NearTutorialContract {
  */
 #[cfg(test)]
 mod tests {
-    use near_sdk::{
-        test_utils::{accounts, VMContextBuilder},
-        testing_env, NearToken,
-    };
+    use near_sdk::{test_utils::VMContextBuilder, testing_env, NearToken};
 
     use super::*;