diff --git a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ConnectionStringChangeStep.cs b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ConnectionStringChangeStep.cs
index ba42500007..d12bc45866 100644
--- a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ConnectionStringChangeStep.cs
+++ b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ConnectionStringChangeStep.cs
@@ -1,7 +1,9 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.RegularExpressions;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 using Volo.Abp.Cli.ProjectBuilding.Files;
 
 namespace Volo.Abp.Cli.ProjectBuilding.Building.Steps
@@ -10,31 +12,24 @@ namespace Volo.Abp.Cli.ProjectBuilding.Building.Steps
     {
         public override void Execute(ProjectBuildContext context)
         {
-            var newConnectionString = context.BuildArgs.ConnectionString;
+            var newConnectionString = "\"Default\": \"" + context.BuildArgs.ConnectionString + "\"";
 
             var appSettingsJsonFiles = context.Files.Where(f =>
                 f.Name.EndsWith("appsettings.json", StringComparison.OrdinalIgnoreCase));
 
             foreach (var appSettingsJson in appSettingsJsonFiles)
             {
-                var appSettingsObject = JsonConvert.DeserializeObject<AppSettingsConnectionStringModel>(appSettingsJson.Content);
-                var oldConnectionString = appSettingsObject.ConnectionStrings.Default;
-                appSettingsJson.ReplaceText(oldConnectionString, newConnectionString);
-            }
-        }
-
-        public class ConnectionStringModel
-        {
-            public string Default { get; set; }
-        }
-
-        public class AppSettingsConnectionStringModel
-        {
-            public ConnectionStringModel ConnectionStrings { get; set; }
+                try
+                {
+                    var jsonObject = JObject.Parse(appSettingsJson.Content);
+                    var defaultConnectionString = ((Newtonsoft.Json.Linq.JContainer)jsonObject["ConnectionStrings"]).First.ToString();
 
-            public string GetDefaultConnectionString()
-            {
-                return ConnectionStrings?.Default;
+                    appSettingsJson.ReplaceText(defaultConnectionString, newConnectionString);
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine("Cannot change the connection string in " + appSettingsJson.Name + ". Error: " + ex.Message);
+                }
             }
         }
     }