diff --git a/src/server/routes/contract/write/write.ts b/src/server/routes/contract/write/write.ts
index f58990c30..892458bca 100644
--- a/src/server/routes/contract/write/write.ts
+++ b/src/server/routes/contract/write/write.ts
@@ -1,8 +1,8 @@
-import { Type, type Static } from "@sinclair/typebox";
+import { type Static, Type } from "@sinclair/typebox";
 import type { FastifyInstance } from "fastify";
 import { StatusCodes } from "http-status-codes";
 import { prepareContractCall, resolveMethod } from "thirdweb";
-import type { AbiFunction } from "thirdweb/utils";
+import { type AbiFunction, parseAbiParams } from "thirdweb/utils";
 import { getContractV5 } from "../../../../utils/cache/getContractv5";
 import { prettifyError } from "../../../../utils/error";
 import { queueTransaction } from "../../../../utils/transaction/queueTransation";
@@ -83,8 +83,13 @@ export async function writeToContract(fastify: FastifyInstance) {
       // 3. functionName passed as function name + inferred ABI (fetched at encode time)
       // this is all handled inside the `resolveMethod` function
       let method: AbiFunction;
+      let params: Array<string | bigint | boolean | object>;
       try {
         method = await resolveMethod(functionName)(contract);
+        params = parseAbiParams(
+          method.inputs.map((i) => i.type),
+          args,
+        );
       } catch (e) {
         throw createCustomError(
           prettifyError(e),
@@ -95,7 +100,7 @@ export async function writeToContract(fastify: FastifyInstance) {
       const transaction = prepareContractCall({
         contract,
         method,
-        params: args,
+        params,
         ...parseTransactionOverrides(txOverrides),
       });
 
diff --git a/test/e2e/tests/write.test.ts b/test/e2e/tests/write.test.ts
index bfe72b146..c49e45ac3 100644
--- a/test/e2e/tests/write.test.ts
+++ b/test/e2e/tests/write.test.ts
@@ -1,6 +1,6 @@
 import { beforeAll, describe, expect, test } from "bun:test";
 import assert from "node:assert";
-import type { Address } from "thirdweb";
+import { type Address, stringToHex } from "thirdweb";
 import { zeroAddress } from "viem";
 import type { ApiError } from "../../../sdk/dist/thirdweb-dev-engine.cjs";
 import { CONFIG } from "../config";
@@ -69,6 +69,98 @@ describe("Write Tests", () => {
     expect(writeTransactionStatus.minedAt).toBeDefined();
   });
 
+  test.only("Write to a contract with untyped args", async () => {
+    const res = await engine.deploy.deployNftDrop(
+      CONFIG.CHAIN.id.toString(),
+      backendWallet,
+      {
+        contractMetadata: {
+          name: "test token",
+          platform_fee_basis_points: 0,
+          platform_fee_recipient: zeroAddress,
+          symbol: "TT",
+          trusted_forwarders: [],
+          seller_fee_basis_points: 0,
+          fee_recipient: zeroAddress,
+        },
+      },
+    );
+
+    expect(res.result.queueId).toBeDefined();
+    assert(res.result.queueId, "queueId must be defined");
+    expect(res.result.deployedAddress).toBeDefined();
+    const nftDropContractAddress = res.result.deployedAddress;
+
+    if (!nftDropContractAddress) {
+      throw new Error("nftDropContractAddress must be defined");
+    }
+
+    const transactionStatus = await pollTransactionStatus(
+      engine,
+      res.result.queueId,
+      true,
+    );
+
+    expect(transactionStatus.minedAt).toBeDefined();
+    const writeRes = await engine.contract.write(
+      CONFIG.CHAIN.id.toString(),
+      nftDropContractAddress,
+      backendWallet,
+      {
+        functionName: "setApprovalForAll",
+        args: [
+          "0x1234567890123456789012345678901234567890",
+          "true", // string instead of bool
+        ],
+      },
+    );
+
+    expect(writeRes.result.queueId).toBeDefined();
+
+    const writeTransactionStatus = await pollTransactionStatus(
+      engine,
+      writeRes.result.queueId,
+      true,
+    );
+
+    expect(writeTransactionStatus.minedAt).toBeDefined();
+
+    const writeRes2 = await engine.contract.write(
+      CONFIG.CHAIN.id.toString(),
+      nftDropContractAddress,
+      backendWallet,
+      {
+        functionName: "setClaimConditions",
+        args: [
+          // stringified array of structs
+          JSON.stringify([
+            {
+              startTimestamp: "0",
+              maxClaimableSupply: "100000",
+              supplyClaimed: "0",
+              quantityLimitPerWallet: "10",
+              merkleRoot: stringToHex("", { size: 32 }),
+              pricePerToken: "0",
+              currency: zeroAddress,
+              metadata: "",
+            },
+          ]),
+          "false",
+        ],
+      },
+    );
+
+    expect(writeRes2.result.queueId).toBeDefined();
+
+    const writeTransactionStatus2 = await pollTransactionStatus(
+      engine,
+      writeRes2.result.queueId,
+      true,
+    );
+
+    expect(writeTransactionStatus2.minedAt).toBeDefined();
+  });
+
   test("Write to a contract with function signature", async () => {
     const writeRes = await engine.contract.write(
       CONFIG.CHAIN.id.toString(),