diff --git a/src/app.ts b/src/app.ts
index 36e33a1..f41c158 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -33,7 +33,7 @@ mongoose.Promise = bluebird;
 mongoose.connect(mongoUrl, { useNewUrlParser: true, useCreateIndex: true, useUnifiedTopology: true } ).then(
     () => { /** ready to use. The `mongoose.connect()` promise resolves to undefined. */ },
 ).catch(err => {
-    console.log("MongoDB connection error. Please make sure MongoDB is running. " + err);
+    console.log(`MongoDB connection error. Please make sure MongoDB is running. ${err}`);
     // process.exit();
 });