diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 0000000..e52563f
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,20 @@
+name: Check Pull Request
+
+name: Node.js CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '20.x'
+      - run: npm ci
+      - run: npm run build
+      - run: npm test
+      - run: npm run lint
diff --git a/package.json b/package.json
index 8e8d774..df3a296 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
   "types": "dist/index.d.ts",
   "scripts": {
     "test": "vitest",
+    "lint": "eslint src",
     "test:watch": "vitest --watch",
     "build": "tsc && tsc-alias",
     "dev": "concurrently 'tsc --watch' 'tsc-alias --watch'",
diff --git a/src/builder.ts b/src/builder.ts
index 76c4ca5..18f2cf6 100644
--- a/src/builder.ts
+++ b/src/builder.ts
@@ -1,12 +1,6 @@
-import {
-  Contracts,
-  CreateSubscriptionOptions,
-  Indexer,
-  Config,
-  createIndexer,
-} from "@/indexer";
+import { Contracts, Indexer, Config, createIndexer } from "@/indexer";
 import { Abi, ExtractAbiEventNames } from "abitype";
-import { EventHandler, EventHandlers } from "@/types";
+import { EventHandlers } from "@/types";
 
 export function buildIndexer() {
   return new IndexerBuilder({});