diff --git a/server/core/Logger.js b/server/core/Logger.js
index 8c74e2d0..a7bbcfb6 100644
--- a/server/core/Logger.js
+++ b/server/core/Logger.js
@@ -153,11 +153,11 @@ class FileLog extends BaseLog {
             }, LOG_ROTATE_FILE_CHECK_INTERVAL);
         };
 
-        await fs.writeAsync(this.fd, new Buffer(data.join('')));
+        await fs.writeAsync(this.fd, Buffer.from(data.join('')));
     }
 
     flushImplSync(data) {
-        fs.writeSync(this.fd, new Buffer(data.join('')));
+        fs.writeSync(this.fd, Buffer.from(data.join('')));
     }
 
 }
diff --git a/server/core/SqliteConnectionPool.js b/server/core/SqliteConnectionPool.js
index b3d64d0f..11452cea 100644
--- a/server/core/SqliteConnectionPool.js
+++ b/server/core/SqliteConnectionPool.js
@@ -6,15 +6,16 @@ const waitingDelay = 100; //ms
 
 class SqliteConnectionPool {
     constructor(connCount, logger, config) {
-        this.config = config;
         this.connCount = connCount;
+        this.logger = logger;
+        this.config = config;
     }
 
     async init() {
         this.logger.log('Opening database');
 
-        utils.mkDirIfNotExistsSync(config.dataDir);
-        const dbFileName = config.dataDir + '/' + config.dbFileName;
+        utils.mkDirIfNotExistsSync(this.config.dataDir);
+        const dbFileName = this.config.dataDir + '/' + this.config.dbFileName;
 
         this.connections = [];
         this.taken = new Set();
diff --git a/server/core/utils.js b/server/core/utils.js
index 38f793b6..9b20c53b 100644
--- a/server/core/utils.js
+++ b/server/core/utils.js
@@ -13,7 +13,6 @@ function statPathSync(path) {
 }
 
 function mkDirIfNotExistsSync(path) {
-    console.log(path);
     let exists = statPathSync(path);
     if (!exists) {
         fs.mkdirSync(path, {recursive: true, mode: 0o755});
diff --git a/server/index.js b/server/index.js
index f792eb1f..4927dcfa 100644
--- a/server/index.js
+++ b/server/index.js
@@ -10,8 +10,8 @@ async function main() {
     const connPool = new SqliteConnectionPool(20, logger, config);
     await connPool.init();
 
-    app.use(app.json());
-    app.static('public');
+    app.use(express.json());
+    express.static('public');
 
     require('./routes')(app, connPool, logger, config);