diff --git a/Yavsc/Migrations/ApplicationDbContextModelSnapshot.cs b/Yavsc/Migrations/ApplicationDbContextModelSnapshot.cs
index 4e210d73..11f18eb8 100644
--- a/Yavsc/Migrations/ApplicationDbContextModelSnapshot.cs
+++ b/Yavsc/Migrations/ApplicationDbContextModelSnapshot.cs
@@ -1,8 +1,6 @@
 using System;
 using Microsoft.Data.Entity;
 using Microsoft.Data.Entity.Infrastructure;
-using Microsoft.Data.Entity.Metadata;
-using Microsoft.Data.Entity.Migrations;
 using Yavsc.Models;
 
 namespace Yavsc.Migrations
diff --git a/Yavsc/Model/ApplicationDbContext.cs b/Yavsc/Model/ApplicationDbContext.cs
index 59741b79..2ca91bc8 100644
--- a/Yavsc/Model/ApplicationDbContext.cs
+++ b/Yavsc/Model/ApplicationDbContext.cs
@@ -28,6 +28,7 @@ namespace Yavsc.Models
             builder.Entity<BookQuery>().Property(x=>x.CreationDate).HasDefaultValueSql("LOCALTIMESTAMP");
             builder.Entity<Blog>().Property(x=>x.Posted).HasDefaultValueSql("LOCALTIMESTAMP");
             builder.Entity<GoogleCloudMobileDeclaration>().Property(x=>x.DeclarationDate).HasDefaultValueSql("LOCALTIMESTAMP");
+            builder.Entity<PostTag>().HasKey(x=>new { x.PostId, x.TagId});
         }
         
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
@@ -173,5 +174,9 @@ namespace Yavsc.Models
         public DbSet<ExceptionSIREN> ExceptionsSIREN { get; set; }
 
         public DbSet<Location> Locations { get; set; }
+
+        public DbSet<Tag> Tags { get; set; }
+
+        public DbSet<PostTag> TagsDomain { get; set; }
     }
 }