diff --git a/packages/utils/CHANGELOG.json b/packages/utils/CHANGELOG.json
index e8c157f979..a1d8f197c8 100644
--- a/packages/utils/CHANGELOG.json
+++ b/packages/utils/CHANGELOG.json
@@ -13,6 +13,10 @@
             {
                 "note": "`ZeroExRevertErrors.Migrate` -> `ZeroExRevertErrors.Ownable`",
                 "pr": 2564
+            },
+            {
+                "note": "`instanceof Array` => `Array.isArray`",
+                "pr": 2567
             }
         ]
     },
diff --git a/packages/utils/src/abi_encoder/abstract_data_types/types/set.ts b/packages/utils/src/abi_encoder/abstract_data_types/types/set.ts
index 5279811336..9bb22180bd 100644
--- a/packages/utils/src/abi_encoder/abstract_data_types/types/set.ts
+++ b/packages/utils/src/abi_encoder/abstract_data_types/types/set.ts
@@ -43,10 +43,9 @@ export abstract class AbstractSetDataType extends DataType {
     }
 
     public generateCalldataBlock(value: any[] | object, parentBlock?: CalldataBlock): SetCalldataBlock {
-        const block =
-            value instanceof Array
-                ? this._generateCalldataBlockFromArray(value, parentBlock)
-                : this._generateCalldataBlockFromObject(value, parentBlock);
+        const block = Array.isArray(value)
+            ? this._generateCalldataBlockFromArray(value, parentBlock)
+            : this._generateCalldataBlockFromObject(value, parentBlock);
         return block;
     }