diff --git a/res/sweat.wasm b/res/sweat.wasm
index 886d309..712b304 100755
Binary files a/res/sweat.wasm and b/res/sweat.wasm differ
diff --git a/sweat/src/core.rs b/sweat/src/core.rs
index 59179bb..c1a20e0 100644
--- a/sweat/src/core.rs
+++ b/sweat/src/core.rs
@@ -1,5 +1,5 @@
 use near_contract_standards::{
-    fungible_token::FungibleTokenCore,
+    fungible_token::{FungibleTokenCore, FungibleTokenResolver},
     storage_management::{StorageBalance, StorageBalanceBounds, StorageManagement},
 };
 use near_sdk::{json_types::U128, near_bindgen, AccountId, NearToken, PromiseOrValue};
@@ -58,3 +58,11 @@ impl StorageManagement for Contract {
         self.token.storage_balance_of(account_id)
     }
 }
+
+#[near_bindgen]
+impl FungibleTokenResolver for Contract {
+    fn ft_resolve_transfer(&mut self, sender_id: AccountId, receiver_id: AccountId, amount: U128) -> U128 {
+        let (used_amount, _burned_amount) = self.token.internal_ft_resolve_transfer(&sender_id, receiver_id, amount);
+        used_amount.into()
+    }
+}