diff --git a/.gitignore b/.gitignore
index 96fab4f..a608608 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,3 +36,5 @@ yarn-error.log*
 # Misc
 .DS_Store
 *.pem
+
+.idea
\ No newline at end of file
diff --git a/packages/sdk/package.json b/packages/sdk/package.json
index 3fc96c0..4ded2ac 100644
--- a/packages/sdk/package.json
+++ b/packages/sdk/package.json
@@ -83,7 +83,6 @@
     "ethers": "^6.12.1",
     "ffjavascript": "^0.2.63",
     "idb-keyval": "^6.2.1",
-    "js-sha3": "^0.8.0",
     "node-fetch": "^2.7.0",
     "snarkjs": "^0.7.4"
   }
diff --git a/packages/sdk/src/crypto/hash.ts b/packages/sdk/src/crypto/hash.ts
index 3929e5c..3c7db8d 100644
--- a/packages/sdk/src/crypto/hash.ts
+++ b/packages/sdk/src/crypto/hash.ts
@@ -1,4 +1,4 @@
-import { keccak256 } from "js-sha3";
+import { keccak256, toUtf8Bytes } from "ethers";
 
 import { poseidon, BigInter } from "@/crypto/babyzk/deps";
 import { Result, Err, Ok, encase } from "@/errors";
@@ -89,7 +89,7 @@ function poseidonBytesX(msg: Uint8Array, frameSize: number): Result<bigint> {
  * @returns a bigint, uint256 hash result.
  */
 export const keccak256Str = (s: string): Result<bigint> => {
-  return Ok(BigInt("0x" + keccak256(s)));
+  return Ok(BigInt(keccak256(toUtf8Bytes(s))));
 };
 
 const bytesBEtoBigInt = (bytes: Uint8Array): bigint => {
diff --git a/packages/sdk/tsup.config.ts b/packages/sdk/tsup.config.ts
index 01e0390..c8d0543 100644
--- a/packages/sdk/tsup.config.ts
+++ b/packages/sdk/tsup.config.ts
@@ -35,7 +35,7 @@ const COMMON_CONFIG: MandatoryOptions = {
 // ESM config
 const ESM_CONFIG: MandatoryOptions = {
   ...DEFAULT_CONFIG,
-  entry: ["src/**/*.ts", "!src/**/*.test.*", "!src/testutils"], // Include all files but tests, better tree-shaking
+  entry: ["src/index.ts", "!src/**/*.test.*", "!src/testutils"], // Include all files but tests, better tree-shaking
   format: "esm",
   outDir: "dist/esm",
   platform: "browser",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f2696e7..af2ea57 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -388,9 +388,6 @@ importers:
       idb-keyval:
         specifier: ^6.2.1
         version: 6.2.1
-      js-sha3:
-        specifier: ^0.8.0
-        version: 0.8.0
       node-fetch:
         specifier: ^2.7.0
         version: 2.7.0