diff --git a/jestconfig.json b/jestconfig.json
index 19c2be5..771d3c8 100644
--- a/jestconfig.json
+++ b/jestconfig.json
@@ -20,6 +20,5 @@
     "TEST": true
   },
   "testRegex": "/test/.*\\.test\\.ts$",
-  "collectCoverageFrom": ["src/**/*.{ts,js}"],
-  "useESM": true
+  "collectCoverageFrom": ["src/**/*.{ts,js}"]
 }
diff --git a/src/worker.ts b/src/worker.ts
index 39d8546..ba6eb8c 100644
--- a/src/worker.ts
+++ b/src/worker.ts
@@ -42,19 +42,21 @@ export const app = new Hono<{
   }
 });
 
-app.use(
-  '*',
-  sentry({
-    dsn: SENTRY_DSN,
-    requestDataOptions: {
-      allowedHeaders: /(.*)/,
-      allowedSearchParams: /(.*)/
-    },
+if (SENTRY_DSN) {
+  app.use(
+    '*',
+    sentry({
+      dsn: SENTRY_DSN,
+      requestDataOptions: {
+        allowedHeaders: /(.*)/,
+        allowedSearchParams: /(.*)/
+      },
 
-    // integrations: [new RewriteFrames({ root: '/' }) as any],
-    release: RELEASE_NAME
-  })
-);
+      // integrations: [new RewriteFrames({ root: '/' }) as any],
+      release: RELEASE_NAME
+    })
+  );
+}
 
 app.use('*', async (c, next) => {
   /* Apply all headers from Constants.RESPONSE_HEADERS */