diff --git a/src/mint.ts b/src/mint.ts
index f02e221..5b53420 100644
--- a/src/mint.ts
+++ b/src/mint.ts
@@ -130,6 +130,7 @@ const program = new Command()
       .newTx()
       .mintAssets({
         assets: Assets.fromRecord({ [token]: amount }),
+        redeemer: TransactionHash.toBytes(ref.transactionId),
       })
       .readFrom({ referenceInputs: [refScript] })
       .collectFrom({ inputs: [ref] })
diff --git a/validators/mint.ak b/validators/mint.ak
index c7fcd57..f058ed8 100644
--- a/validators/mint.ak
+++ b/validators/mint.ak
@@ -6,11 +6,15 @@ use cardano/assets.{PolicyId, Value}
 use cardano/transaction.{Input, NoDatum, Output, OutputReference, Transaction}
 
 validator mint(tx_id: Hash<Blake2b_256, Transaction>, index: Int) {
-  mint(_redeemer, policy: PolicyId, self: Transaction) {
+  mint(
+    redeemer: Hash<Blake2b_256, Transaction>,
+    policy: PolicyId,
+    self: Transaction,
+  ) {
     let reference =
       OutputReference { transaction_id: tx_id, output_index: index }
     let Transaction { inputs, mint, .. } = self
-    mint_validator(policy, reference, inputs, mint)
+    redeemer == tx_id && mint_validator(policy, reference, inputs, mint)
   }
 
   else(_) {