diff --git a/packages/openapi-ts/src/compiler/typedef.ts b/packages/openapi-ts/src/compiler/typedef.ts
index 20fd4131c..5a8cc88b0 100644
--- a/packages/openapi-ts/src/compiler/typedef.ts
+++ b/packages/openapi-ts/src/compiler/typedef.ts
@@ -170,10 +170,11 @@ export const createTypeRecordNode = (
 export const createTypeArrayNode = (
   types: (any | ts.TypeNode)[],
   isNullable: boolean = false,
+  isUnique: boolean = false,
 ) => {
   const node = createTypeReferenceNode({
     typeArguments: [createTypeUnionNode({ types })],
-    typeName: 'Array',
+    typeName: isUnique ? 'Set' : 'Array',
   });
   return maybeNullable({ isNullable, node });
 };
diff --git a/packages/openapi-ts/src/utils/type.ts b/packages/openapi-ts/src/utils/type.ts
index 74fc159e1..3a4985858 100644
--- a/packages/openapi-ts/src/utils/type.ts
+++ b/packages/openapi-ts/src/utils/type.ts
@@ -79,10 +79,18 @@ const typeArray = (model: Model) => {
       return tuple;
     }
 
-    return compiler.typeArrayNode([toType(model.link)], model.isNullable);
+    return compiler.typeArrayNode(
+      [toType(model.link)],
+      model.isNullable,
+      model.uniqueItems,
+    );
   }
 
-  return compiler.typeArrayNode([base(model)], model.isNullable);
+  return compiler.typeArrayNode(
+    [base(model)],
+    model.isNullable,
+    model.uniqueItems,
+  );
 };
 
 const typeEnum = (model: Model) => {