diff --git a/bindings/nodejs/lib/types/block/output/feature.ts b/bindings/nodejs/lib/types/block/output/feature.ts
index 0ea713e422..a9fefdd2be 100644
--- a/bindings/nodejs/lib/types/block/output/feature.ts
+++ b/bindings/nodejs/lib/types/block/output/feature.ts
@@ -163,9 +163,9 @@ class BlockIssuerFeature extends Feature {
     @Type(() => BlockIssuerKey, {
         discriminator: BlockIssuerKeyDiscriminator,
     })
-    readonly blockIssuerKeys: Set<BlockIssuerKey>;
+    readonly blockIssuerKeys: BlockIssuerKey[];
 
-    constructor(expirySlot: SlotIndex, blockIssuerKeys: Set<BlockIssuerKey>) {
+    constructor(expirySlot: SlotIndex, blockIssuerKeys: BlockIssuerKey[]) {
         super(FeatureType.BlockIssuer);
         this.expirySlot = expirySlot;
         this.blockIssuerKeys = blockIssuerKeys;