diff --git a/src/config/config.ts b/src/config/config.ts
index 0692d55b0fe58b9d10e6f85d7e04ebf3648172c9..a3412128e1417e0a7818ce96940d070e74034a5e 100644
--- a/src/config/config.ts
+++ b/src/config/config.ts
@@ -75,3 +75,5 @@ module.exports = {
     // to be defined
   }
 }
+
+export {}
diff --git a/src/config/dbconn.ts b/src/config/dbconn.ts
index 8835552d3c616fe73070545500441df539c70efd..aa37318c0698017ef11e014cb83cb7607fe6beab 100644
--- a/src/config/dbconn.ts
+++ b/src/config/dbconn.ts
@@ -37,4 +37,4 @@ const dbconn = {
   project: projectConnection
 }
 
-export {dbconn}
+export { dbconn }
diff --git a/src/controller/controller.ts b/src/controller/controller.ts
index 61faa6943f269fccac2beefadb8ca68dc63becff..3c1b5c868803bcae466af96151cd76faade7dac7 100644
--- a/src/controller/controller.ts
+++ b/src/controller/controller.ts
@@ -19,7 +19,7 @@ const controller = {
   },
   getProjectOverviewById: async function (projectId: number) {
     try {
-      const rows: any = await dbconn.project.promise().query('CALL GetProjectInformationByProjectID(' + projectId + ')')
+      const rows: any = await dbconn.project.promise().query('CALL GetProjectInformationByProjectID(' + String(projectId) + ')')
       if (rows[0][0]) {
         return rows[0][0]
       } else { return null }
@@ -29,7 +29,7 @@ const controller = {
   },
   getProjectImagesById: async function (projectId: number) {
     try {
-      const rows: any = await dbconn.project.promise().query('CALL getImagesByProjectID(' + projectId + ')')
+      const rows: any = await dbconn.project.promise().query('CALL getImagesByProjectID(' + String(projectId) + ')')
       if (rows[0][0]) {
         return rows[0][0]
       } else { return null }