diff --git a/packages/ckb-indexer/package.json b/packages/ckb-indexer/package.json
index 3a012e9881..188d39de05 100644
--- a/packages/ckb-indexer/package.json
+++ b/packages/ckb-indexer/package.json
@@ -21,7 +21,8 @@
     "cross-fetch": "3.1.5"
   },
   "devDependencies": {
-    "events": "3.3.0"
+    "events": "3.3.0",
+    "eslint": "8.15.0"
   },
   "scripts": {
     "build": "tsc",
diff --git a/packages/ckb-indexer/tsconfig.json b/packages/ckb-indexer/tsconfig.json
index dd48688d89..ec78ef7742 100644
--- a/packages/ckb-indexer/tsconfig.json
+++ b/packages/ckb-indexer/tsconfig.json
@@ -5,7 +5,7 @@
     "lib": ["es2020", "dom"],
     "module": "commonjs",
     "declaration": true,
-    "sourceMap": true,
+    "sourceMap": true
   },
   "include": ["src"]
 }