diff --git a/balance-prover/src/api/api.rs b/balance-prover/src/api/api.rs
index cb511da..697b090 100644
--- a/balance-prover/src/api/api.rs
+++ b/balance-prover/src/api/api.rs
@@ -29,7 +29,7 @@ pub async fn prove_send(
     let proof = state
         .prove_send(
             request.pubkey,
-            &request.tx_witnes,
+            &request.tx_witness,
             &request.update_witness,
             &request.spent_proof,
             &request.prev_proof,
diff --git a/client-sdk/src/external_api/balance_prover.rs b/client-sdk/src/external_api/balance_prover.rs
index 678a826..215f927 100644
--- a/client-sdk/src/external_api/balance_prover.rs
+++ b/client-sdk/src/external_api/balance_prover.rs
@@ -68,14 +68,14 @@ impl BalanceProverClientInterface for BalanceProverClient {
         &self,
         _key: KeySet,
         pubkey: U256,
-        tx_witnes: &TxWitness,
+        tx_witness: &TxWitness,
         update_witness: &UpdateWitness<F, C, D>,
         spent_proof: &ProofWithPublicInputs<F, C, D>,
         prev_proof: &Option<ProofWithPublicInputs<F, C, D>>,
     ) -> Result<ProofWithPublicInputs<F, C, D>, ServerError> {
         let request = ProveSendRequest {
             pubkey,
-            tx_witnes: tx_witnes.clone(),
+            tx_witness: tx_witness.clone(),
             update_witness: update_witness.clone(),
             spent_proof: spent_proof.clone(),
             prev_proof: prev_proof.clone(),
diff --git a/interfaces/src/api/balance_prover/types.rs b/interfaces/src/api/balance_prover/types.rs
index 111d587..91060f7 100644
--- a/interfaces/src/api/balance_prover/types.rs
+++ b/interfaces/src/api/balance_prover/types.rs
@@ -33,7 +33,7 @@ pub struct ProveSpentRequest {
 #[serde(rename_all = "camelCase")]
 pub struct ProveSendRequest {
     pub pubkey: U256,
-    pub tx_witnes: TxWitness,
+    pub tx_witness: TxWitness,
     pub update_witness: UpdateWitness<F, C, D>,
     pub spent_proof: ProofWithPublicInputs<F, C, D>,
     pub prev_proof: Option<ProofWithPublicInputs<F, C, D>>,