diff --git a/backend/src/index.ts b/backend/src/index.ts
index 18ac9d9c1..1c3814096 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -26,10 +26,7 @@ const DB_VERSION = '0001-init_db'
 
 async function main() {
   // open mysql connection
-  let con = null
-  try {
-    con = await connection()
-  } catch (error) {}
+  const con = await connection()
   if (!con || !con.isConnected) {
     throw new Error(`Couldn't open connection to database`)
   }
diff --git a/backend/src/typeorm/connection.ts b/backend/src/typeorm/connection.ts
index b108c5ef5..db7dbcb29 100644
--- a/backend/src/typeorm/connection.ts
+++ b/backend/src/typeorm/connection.ts
@@ -2,18 +2,21 @@ import { createConnection, Connection } from 'typeorm'
 import CONFIG from '../config'
 import path from 'path'
 
-const connection = async (): Promise<Connection> => {
-  const con = await createConnection({
-    name: 'default',
-    type: 'mysql',
-    host: CONFIG.DB_HOST,
-    port: CONFIG.DB_PORT,
-    username: CONFIG.DB_USER,
-    password: CONFIG.DB_PASSWORD,
-    database: CONFIG.DB_DATABASE,
-    entities: [path.join(__dirname, 'entity', '*.ts')],
-    synchronize: false,
-  })
+const connection = async (): Promise<Connection | null> => {
+  let con = null
+  try {
+    con = await createConnection({
+      name: 'default',
+      type: 'mysql',
+      host: CONFIG.DB_HOST,
+      port: CONFIG.DB_PORT,
+      username: CONFIG.DB_USER,
+      password: CONFIG.DB_PASSWORD,
+      database: CONFIG.DB_DATABASE,
+      entities: [path.join(__dirname, 'entity', '*.ts')],
+      synchronize: false,
+    })
+  } catch (error) {}
 
   return con
 }