diff --git a/src/Identity/UI/src/IdentityBuilderUIExtensions.cs b/src/Identity/UI/src/IdentityBuilderUIExtensions.cs
index 3434ac4d43ec..0f959c7fb20f 100644
--- a/src/Identity/UI/src/IdentityBuilderUIExtensions.cs
+++ b/src/Identity/UI/src/IdentityBuilderUIExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) .NET Foundation. All rights reserved.
+// Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
@@ -30,7 +30,7 @@ public static class IdentityBuilderUIExtensions
         /// </remarks>
         /// <param name="builder">The <see cref="IdentityBuilder"/>.</param>
         /// <returns>The <see cref="IdentityBuilder"/>.</returns>
-        public static IdentityBuilder AddDefaultUI(this IdentityBuilder builder) => builder.AddDefaultUI(UIFramework.Bootstrap3);
+        public static IdentityBuilder AddDefaultUI(this IdentityBuilder builder) => builder.AddDefaultUI(UIFramework.Bootstrap4);
 
 
         /// <summary>
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Startup.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Startup.cs
index 873df0eed7b0..0b58b5b6b02e 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Startup.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Startup.cs
@@ -68,7 +68,6 @@ public void ConfigureServices(IServiceCollection services)
                     Configuration.GetConnectionString("DefaultConnection")));
 #endif
             services.AddDefaultIdentity<IdentityUser>()
-                .AddDefaultUI(UIFramework.Bootstrap4)
                 .AddEntityFrameworkStores<ApplicationDbContext>();
 #elif (OrganizationalAuth)
             services.AddAuthentication(AzureADDefaults.AuthenticationScheme)
diff --git a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Startup.cs b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Startup.cs
index 90a7bed7e6b3..e546c74fc2dc 100644
--- a/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Startup.cs
+++ b/src/ProjectTemplates/Web.ProjectTemplates/content/StarterWeb-CSharp/Startup.cs
@@ -68,7 +68,6 @@ public void ConfigureServices(IServiceCollection services)
                     Configuration.GetConnectionString("DefaultConnection")));
 #endif
             services.AddDefaultIdentity<IdentityUser>()
-                .AddDefaultUI(UIFramework.Bootstrap4)
                 .AddEntityFrameworkStores<ApplicationDbContext>();
 #elif (OrganizationalAuth)
             services.AddAuthentication(AzureADDefaults.AuthenticationScheme)
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Startup.cs b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Startup.cs
index 29219c5915fa..c00c010cb7d2 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Startup.cs
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Startup.cs
@@ -45,7 +45,6 @@ public void ConfigureServices(IServiceCollection services)
     #endif
 
             services.AddDefaultIdentity<ApplicationUser>()
-                .AddDefaultUI(UIFramework.Bootstrap4)
                 .AddEntityFrameworkStores<ApplicationDbContext>();
 
             services.AddIdentityServer()
diff --git a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Startup.cs b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Startup.cs
index 9e65173dd0e8..c49c59d497fd 100644
--- a/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Startup.cs
+++ b/src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Startup.cs
@@ -45,7 +45,6 @@ public void ConfigureServices(IServiceCollection services)
     #endif
 
             services.AddDefaultIdentity<ApplicationUser>()
-                .AddDefaultUI(UIFramework.Bootstrap4)
                 .AddEntityFrameworkStores<ApplicationDbContext>();
 
             services.AddIdentityServer()