diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4376ded..064fd45 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,6 +21,9 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
+      - name: Run linter
+        run: npm run lint -- --max-warnings 0
+
       - name: Build
         run: npm run build
 
diff --git a/src/index.ts b/src/index.ts
index aaeb355..6de171b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -9,6 +9,7 @@ import v1Router from "./api/v1/router";
 import indexerWebhookRouter from "./routes/webhooks/indexer";
 
 import { env } from "./config/env";
+import { metricsHandler, metricsMiddleware } from "./metrics/prometheus";
 
 const app = express();
 const PORT = env.PORT;