diff --git a/Newsbot.Collector.Database/DatabaseContext.cs b/Newsbot.Collector.Database/DatabaseContext.cs
index a3e0fdc..338da9c 100644
--- a/Newsbot.Collector.Database/DatabaseContext.cs
+++ b/Newsbot.Collector.Database/DatabaseContext.cs
@@ -17,8 +17,8 @@ public class DatabaseContext : IdentityDbContext
     public DbSet<SourceEntity> Sources { get; set; } = null!;
 
     public DbSet<UserSourceSubscriptionEntity> UserSourceSubscription { get; set; } = null!;
-    
-    public DbSet<RefreshTokenEntity> RefreshTokens { get; set; }
+
+    public DbSet<RefreshTokenEntity> RefreshTokens { get; set; } = null!;
 
     private string ConnectionString { get; set; } = "";
 
diff --git a/Newsbot.Collector.Database/Newsbot.Collector.Database.csproj b/Newsbot.Collector.Database/Newsbot.Collector.Database.csproj
index 68f1436..47f2b44 100644
--- a/Newsbot.Collector.Database/Newsbot.Collector.Database.csproj
+++ b/Newsbot.Collector.Database/Newsbot.Collector.Database.csproj
@@ -21,6 +21,9 @@
     <TargetFramework>net7.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <NoWarn>8981</NoWarn>
   </PropertyGroup>
 
 </Project>