diff --git a/backend/src/Contact.Api/Contact.Api.csproj b/backend/src/Contact.Api/Contact.Api.csproj
index 6b9130d..09ad052 100644
--- a/backend/src/Contact.Api/Contact.Api.csproj
+++ b/backend/src/Contact.Api/Contact.Api.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <UserSecretsId>49b39230-4f26-4ba3-94cd-9738b4b66435</UserSecretsId>
diff --git a/backend/src/Contact.Api/Program.cs b/backend/src/Contact.Api/Program.cs
index c023b86..eb41258 100644
--- a/backend/src/Contact.Api/Program.cs
+++ b/backend/src/Contact.Api/Program.cs
@@ -12,7 +12,6 @@
 
 // Add services to the container.
 builder.Services.AddInfrastrcutureServices(builder.Configuration);
-builder.Services.AddApplicationServices(builder.Configuration);
 
 var appSettings = builder.Configuration.GetSection("AppSettings").Get<Contact.Application.AppSettings>();
 builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
diff --git a/backend/src/Contact.Application/Contact.Application.csproj b/backend/src/Contact.Application/Contact.Application.csproj
index a787525..f1b1a42 100644
--- a/backend/src/Contact.Application/Contact.Application.csproj
+++ b/backend/src/Contact.Application/Contact.Application.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/backend/src/Contact.Common/Contact.Common.csproj b/backend/src/Contact.Common/Contact.Common.csproj
index d502bd5..d0857f4 100644
--- a/backend/src/Contact.Common/Contact.Common.csproj
+++ b/backend/src/Contact.Common/Contact.Common.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/backend/src/Contact.Domain/Contact.Domain.csproj b/backend/src/Contact.Domain/Contact.Domain.csproj
index 8732b82..c8c31af 100644
--- a/backend/src/Contact.Domain/Contact.Domain.csproj
+++ b/backend/src/Contact.Domain/Contact.Domain.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/backend/src/Contact.Infrastructure/Contact.Infrastructure.csproj b/backend/src/Contact.Infrastructure/Contact.Infrastructure.csproj
index efd4523..57b28b1 100644
--- a/backend/src/Contact.Infrastructure/Contact.Infrastructure.csproj
+++ b/backend/src/Contact.Infrastructure/Contact.Infrastructure.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
@@ -13,11 +13,11 @@
 
   <ItemGroup>
     <PackageReference Include="Dapper" Version="2.1.66" />
-    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="9.0.4" />
-    <PackageReference Include="Npgsql" Version="9.0.3" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.4" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.4" />
-    <PackageReference Include="Microsoft.Extensions.Options" Version="9.0.4" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.10" />
+    <PackageReference Include="Npgsql" Version="8.0.10" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="8.0.10" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.10" />
+    <PackageReference Include="Microsoft.Extensions.Options" Version="8.0.10" />
   </ItemGroup>
 
   <ItemGroup>