diff --git a/common/ASC.Core.Common/Context/Impl/CoreConfiguration.cs b/common/ASC.Core.Common/Context/Impl/CoreConfiguration.cs
index 4a3c6cf9f1..525944df38 100644
--- a/common/ASC.Core.Common/Context/Impl/CoreConfiguration.cs
+++ b/common/ASC.Core.Common/Context/Impl/CoreConfiguration.cs
@@ -27,10 +27,10 @@
 using ASC.Core.Configuration;
 using ASC.Core.Tenants;
 using System;
-using System.Configuration;
 using System.Text;
 using Newtonsoft.Json;
-
+using ASC.Common.Utils;
+
 namespace ASC.Core
 {
     public class CoreConfiguration
diff --git a/web/ASC.Web.Api/Properties/launchSettings.json b/web/ASC.Web.Api/Properties/launchSettings.json
index 86538d034d..8b84fe3dab 100644
--- a/web/ASC.Web.Api/Properties/launchSettings.json
+++ b/web/ASC.Web.Api/Properties/launchSettings.json
@@ -12,19 +12,13 @@
     "IIS Express": {
       "commandName": "IISExpress",
       "launchBrowser": false,
-      "launchUrl": "api/modules",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
+      "launchUrl": "api/modules"
     },
     "ASC.Web.Api": {
       "commandName": "Project",
       "launchBrowser": false,
       "launchUrl": "api/modules",
-      "applicationUrl": "http://localhost:8080",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
+      "applicationUrl": "http://localhost:8080"
     }
   }
 }
\ No newline at end of file
diff --git a/web/ASC.Web.Api/appsettings.Development.json b/web/ASC.Web.Api/appsettings.Development.json
index e203e9407e..8b8ab04572 100644
--- a/web/ASC.Web.Api/appsettings.Development.json
+++ b/web/ASC.Web.Api/appsettings.Development.json
@@ -1,9 +1,20 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Debug",
-      "System": "Information",
-      "Microsoft": "Information"
-    }
-  }
-}
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Debug",
+      "System": "Information",
+      "Microsoft": "Information"
+    }
+  },
+  "ConnectionStrings": {
+    "default": {
+      "name": "default",
+      "connectionString": "Server=172.18.0.2;Port=3306;Database=onlyoffice;User ID=onlyoffice_user;Password=onlyoffice_pass;Pooling=true;Character Set=utf8;AutoEnlist=false;SSL Mode=none",
+      "providerName": "MySql.Data.MySqlClient"
+    }
+  },
+  "core": {
+    "base-domain": "localhost",
+    "machinekey": "1VVAepxpW8f7"
+  }
+}