diff --git a/lib/swagger.js b/lib/swagger.js
index 9e86ced..526e300 100644
--- a/lib/swagger.js
+++ b/lib/swagger.js
@@ -25,8 +25,7 @@ class Swagger {
     this.swaggerObject = utils.prepareSwaggerObject(this.app, utils.prepareDefaultOptions(this.config));
 
     // Load router file
-    let routerPath;
-    routerPath = path.join(this.baseDir, `/app/router.${this.config.ts ? 'ts' : 'js'}`);
+    const routerPath = path.join(this.baseDir, `/app/router.${this.config.ts ? 'ts' : 'js'}`);
 
     this.router = new Router(this.app, routerPath);
     this.router.getRouter();