diff --git a/packages/zkdb/.npmignore b/packages/zkdb/.npmignore
index 7e3637e0..3c92e84e 100644
--- a/packages/zkdb/.npmignore
+++ b/packages/zkdb/.npmignore
@@ -4,11 +4,6 @@ src
 # Editor
 .vscode
 
-# Build
-build/**/*.test.d.ts
-build/**/*.test.d.ts.map
-build/**/*.test.js
-build/**/*.test.js.map
 
 # System
 .DS_Store
diff --git a/packages/zkdb/package-lock.json b/packages/zkdb/package-lock.json
index 065b6dd3..b37d6085 100644
--- a/packages/zkdb/package-lock.json
+++ b/packages/zkdb/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "zkdb",
-  "version": "0.1.1",
+  "version": "0.1.4",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "zkdb",
-      "version": "0.1.1",
+      "version": "0.1.4",
       "license": "Apache-2.0",
       "dependencies": {
         "@chainsafe/libp2p-noise": "^12.0.1",
diff --git a/packages/zkdb/package.json b/packages/zkdb/package.json
index a20877d0..25e7d7e5 100644
--- a/packages/zkdb/package.json
+++ b/packages/zkdb/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zkdb",
-  "version": "0.1.2",
+  "version": "0.1.4",
   "description": "zkDatabase for the future of Web3",
   "author": "chiro@orochi.network",
   "license": "Apache-2.0",
@@ -20,8 +20,7 @@
   },
   "homepage": "https://github.com/orochi-network/zkDatabase#readme",
   "type": "module",
-  "main": "build/src/index.js",
-  "types": "build/src/index.d.ts",
+  "types": "./build/src/core/index.d.ts",
   "scripts": {
     "release": "rm -rf ./build && npm run build && npm publish --access public",
     "build": "tsc -p tsconfig.json",
@@ -34,6 +33,22 @@
     "lint": "npx eslint ./src/**/*.ts --fix",
     "lint-check": "npx eslint ./src/**/*.ts --debug"
   },
+  "typesVersions": {
+    "*": {
+      "*": [
+        "*",
+        "build/src/*"
+      ]
+    }
+  },
+  "files": [
+    "build/src",
+    "!**/*.tsbuildinfo",
+    "!**/*.test.js",
+    "!**/*.test.js.map",
+    "!**/*.test.d.ts",
+    "!**/*.test.d.ts.map"
+  ],
   "exports": {
     ".": {
       "types": "./build/src/core/index.d.ts",
diff --git a/packages/zkdb/src/merkle-tree/merkle-tree-storage.ts b/packages/zkdb/src/merkle-tree/merkle-tree-storage.ts
index c327ec88..d548bdfa 100644
--- a/packages/zkdb/src/merkle-tree/merkle-tree-storage.ts
+++ b/packages/zkdb/src/merkle-tree/merkle-tree-storage.ts
@@ -7,7 +7,7 @@ export const MERKLE_TREE_COLLECTION_NAME = '.security';
 
 export const MERKLE_TREE_FILE_NAME = 'merkle_tree';
 
-export default class MerkleTreeStorage extends BaseMerkleTree {
+export class MerkleTreeStorage extends BaseMerkleTree {
   private storageEngine: StorageEngine;
 
   /**
diff --git a/packages/zkdb/src/merkle-tree/merkle-tree.test.ts b/packages/zkdb/src/merkle-tree/merkle-tree.test.ts
index 83aa4e99..6f6e1f61 100644
--- a/packages/zkdb/src/merkle-tree/merkle-tree.test.ts
+++ b/packages/zkdb/src/merkle-tree/merkle-tree.test.ts
@@ -1,7 +1,7 @@
 import { Poseidon, Field, MerkleTree, Circuit, Bool } from 'snarkyjs';
 import { TMerkleNodesMap, BaseMerkleTree } from './merkle-tree-base.js';
 import crypto from 'crypto';
-import MerkleTreeStorage from './merkle-tree-storage.js';
+import { MerkleTreeStorage } from './merkle-tree-storage.js';
 import { StorageEngineIPFS } from '../storage-engine/ipfs.js';
 
 const DEFAULT_HEIGHT = 20;
diff --git a/packages/zkdb/src/storage-engine/metadata.ts b/packages/zkdb/src/storage-engine/metadata.ts
index f4714310..663ca438 100644
--- a/packages/zkdb/src/storage-engine/metadata.ts
+++ b/packages/zkdb/src/storage-engine/metadata.ts
@@ -1,5 +1,5 @@
 import { SimpleIndexer } from '../index/simple.js';
-import MerkleTreeStorage from '../merkle-tree/merkle-tree-storage.js';
+import { MerkleTreeStorage } from '../merkle-tree/merkle-tree-storage.js';
 import { StorageEngineLocal } from './local.js';
 import { StorageEngineIPFS } from './ipfs.js';
 
diff --git a/packages/zkdb/src/utilities/index.ts b/packages/zkdb/src/utilities/index.ts
new file mode 100644
index 00000000..ebdf16e1
--- /dev/null
+++ b/packages/zkdb/src/utilities/index.ts
@@ -0,0 +1 @@
+export * from './binary.js';