diff --git a/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.Designer.cs b/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.Designer.cs
index 4a801e13bb..9d4043e024 100644
--- a/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.Designer.cs
+++ b/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.Designer.cs
@@ -18,7 +18,7 @@ namespace IdentitySample.DefaultUI.Data.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "2.1.0-preview1-27871")
+                .HasAnnotation("ProductVersion", "2.1.0-preview1-27965")
                 .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);
 
             modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRole", b =>
@@ -136,9 +136,11 @@ namespace IdentitySample.DefaultUI.Data.Migrations
 
             modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
                 {
-                    b.Property<string>("LoginProvider");
+                    b.Property<string>("LoginProvider")
+                        .HasMaxLength(128);
 
-                    b.Property<string>("ProviderKey");
+                    b.Property<string>("ProviderKey")
+                        .HasMaxLength(128);
 
                     b.Property<string>("ProviderDisplayName");
 
@@ -169,9 +171,11 @@ namespace IdentitySample.DefaultUI.Data.Migrations
                 {
                     b.Property<string>("UserId");
 
-                    b.Property<string>("LoginProvider");
+                    b.Property<string>("LoginProvider")
+                        .HasMaxLength(128);
 
-                    b.Property<string>("Name");
+                    b.Property<string>("Name")
+                        .HasMaxLength(128);
 
                     b.Property<string>("Value");
 
diff --git a/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.cs b/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.cs
index d0df5eb3e5..fcf45f7c3e 100644
--- a/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.cs
+++ b/samples/IdentitySample.DefaultUI/Data/Migrations/20171220235730_CreateIdentitySchema.cs
@@ -94,8 +94,8 @@ namespace IdentitySample.DefaultUI.Data.Migrations
                 name: "AspNetUserLogins",
                 columns: table => new
                 {
-                    LoginProvider = table.Column<string>(nullable: false),
-                    ProviderKey = table.Column<string>(nullable: false),
+                    LoginProvider = table.Column<string>(maxLength: 128, nullable: false),
+                    ProviderKey = table.Column<string>(maxLength: 128, nullable: false),
                     ProviderDisplayName = table.Column<string>(nullable: true),
                     UserId = table.Column<string>(nullable: false)
                 },
@@ -139,8 +139,8 @@ namespace IdentitySample.DefaultUI.Data.Migrations
                 columns: table => new
                 {
                     UserId = table.Column<string>(nullable: false),
-                    LoginProvider = table.Column<string>(nullable: false),
-                    Name = table.Column<string>(nullable: false),
+                    LoginProvider = table.Column<string>(maxLength: 128, nullable: false),
+                    Name = table.Column<string>(maxLength: 128, nullable: false),
                     Value = table.Column<string>(nullable: true)
                 },
                 constraints: table =>
diff --git a/samples/IdentitySample.DefaultUI/Data/Migrations/IdentityDbContextModelSnapshot.cs b/samples/IdentitySample.DefaultUI/Data/Migrations/IdentityDbContextModelSnapshot.cs
index a8929b6bfb..97f59eff98 100644
--- a/samples/IdentitySample.DefaultUI/Data/Migrations/IdentityDbContextModelSnapshot.cs
+++ b/samples/IdentitySample.DefaultUI/Data/Migrations/IdentityDbContextModelSnapshot.cs
@@ -17,7 +17,7 @@ namespace IdentitySample.DefaultUI.Data.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "2.1.0-preview1-27871")
+                .HasAnnotation("ProductVersion", "2.1.0-preview1-27965")
                 .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);
 
             modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRole", b =>
@@ -135,9 +135,11 @@ namespace IdentitySample.DefaultUI.Data.Migrations
 
             modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
                 {
-                    b.Property<string>("LoginProvider");
+                    b.Property<string>("LoginProvider")
+                        .HasMaxLength(128);
 
-                    b.Property<string>("ProviderKey");
+                    b.Property<string>("ProviderKey")
+                        .HasMaxLength(128);
 
                     b.Property<string>("ProviderDisplayName");
 
@@ -168,9 +170,11 @@ namespace IdentitySample.DefaultUI.Data.Migrations
                 {
                     b.Property<string>("UserId");
 
-                    b.Property<string>("LoginProvider");
+                    b.Property<string>("LoginProvider")
+                        .HasMaxLength(128);
 
-                    b.Property<string>("Name");
+                    b.Property<string>("Name")
+                        .HasMaxLength(128);
 
                     b.Property<string>("Value");