diff --git a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ChangeThemeStep.cs b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ChangeThemeStep.cs
index 625cb3d500e..69cf456993c 100644
--- a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ChangeThemeStep.cs
+++ b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/ChangeThemeStep.cs
@@ -844,6 +844,13 @@ private void ChangeThemeToBasicForBlazorProjects(ProjectBuildContext context, st
                 $"Blazor{defaultThemeName}ThemeBundles.Scripts.Global",
                 "BlazorBasicThemeBundles.Scripts.Global"
             );
+
+            ChangeNamespace(
+                context,
+                $"/MyCompanyName.MyProjectName.{project.Key}/Pages/_Host.cshtml",
+                $"Volo.Abp.AspNetCore.Components.Web.{defaultThemeName}Theme.Themes.{defaultThemeName}",
+                "Volo.Abp.AspNetCore.Components.Web.BasicTheme.Themes.Basic"
+            );
         }
     }