diff --git a/src/main/java/su/xserver/iikocon/MainVerticle.java b/src/main/java/su/xserver/iikocon/MainVerticle.java
index c713b5b..3d43f43 100644
--- a/src/main/java/su/xserver/iikocon/MainVerticle.java
+++ b/src/main/java/su/xserver/iikocon/MainVerticle.java
@@ -31,7 +31,6 @@ import su.xserver.iikocon.iiko.OlapQueryService;
 import su.xserver.iikocon.service.*;
 
 import java.io.IOException;
-import java.io.InputStream;
 import java.net.URI;
 import java.util.ArrayList;
 import java.util.List;
@@ -55,7 +54,7 @@ public class MainVerticle extends AbstractVerticle {
   private OlapQueryService olapQueryService;
 
   @Override
-  public void start(Promise<Void> startPromise) throws ClassNotFoundException, IOException {
+  public void start(Promise<Void> startPromise) throws ClassNotFoundException {
 
     Class.forName("com.mysql.cj.jdbc.Driver");
     Class.forName("org.postgresql.Driver");