diff --git a/crow/src/lib.rs b/crow/src/lib.rs
index 3a2ea35..d73c4f0 100644
--- a/crow/src/lib.rs
+++ b/crow/src/lib.rs
@@ -161,10 +161,12 @@ impl OfferManager {
         &self,
         id: String,
         signed_challenge: String,
+        source_iban: String,
     ) -> graphql::Result<FiatTopupSetupInfo> {
         let variables = complete_topup_setup::Variables {
             id,
             signed_challenge,
+            source_iban,
         };
         let access_token = self.auth.query_token()?;
         let client = build_client(Some(&access_token))?;
diff --git a/graphql/schemas/operations.graphql b/graphql/schemas/operations.graphql
index 2465f99..d7d0c98 100644
--- a/graphql/schemas/operations.graphql
+++ b/graphql/schemas/operations.graphql
@@ -198,8 +198,8 @@ mutation StartTopupSetup($request: StartTopupSetupRequest!) {
   }
 }
 
-mutation CompleteTopupSetup($id: String!, $signedChallenge: String!) {
-  complete_topup_setup(id: $id, signed_challenge: $signedChallenge) {
+mutation CompleteTopupSetup($id: String!, $signedChallenge: String!, $sourceIban: String!) {
+  complete_topup_setup(id: $id, signed_challenge: $signedChallenge, source_iban: $sourceIban) {
     id
     debitor_iban
     creditor_reference
diff --git a/graphql/schemas/schema_wallet_read.graphql b/graphql/schemas/schema_wallet_read.graphql
index ee3ec95..81f0da9 100644
--- a/graphql/schemas/schema_wallet_read.graphql
+++ b/graphql/schemas/schema_wallet_read.graphql
@@ -730,7 +730,7 @@ type mutation_root {
   accept_terms_conditions_v2(args: AcceptTermsConditionsV2Input): AcceptTermsConditionsV2Response
   accept_wallet_acl_by_pk(pk_columns: AcceptWalletPkRequestInput!): WalletAcl
   assign_lightning_address: LightningAddressResponse
-  complete_topup_setup(id: String!, signed_challenge: String!): CompleteTopupSetupResponse!
+  complete_topup_setup(id: String!, signed_challenge: String!, source_iban: String!): CompleteTopupSetupResponse!
   create_backup(encryptedBackup: String!, schemaName: String!, schemaVersion: String!): CreateBackupResponse
   disable_lightning_addresses(addresses: [String!]!): Void
   enable_lightning_addresses(addresses: [String!]!): Void