diff --git a/Refresh.Common/Refresh.Common.csproj b/Refresh.Common/Refresh.Common.csproj
index 632b2d45d..070bddad2 100644
--- a/Refresh.Common/Refresh.Common.csproj
+++ b/Refresh.Common/Refresh.Common.csproj
@@ -13,6 +13,7 @@
       <PackageReference Include="Bunkum.Protocols.Http" Version="4.9.0" />
       <PackageReference Include="FastAes" Version="1.0.1" />
       <PackageReference Include="IronCompress" Version="1.7.0" />
+      <PackageReference Include="JetBrains.Annotations" Version="2026.2.0" />
       <PackageReference Include="NPTicket" Version="3.1.1" />
     </ItemGroup>
 
diff --git a/Refresh.Database/Refresh.Database.csproj b/Refresh.Database/Refresh.Database.csproj
index 7b4d1dd3f..3e6158a89 100644
--- a/Refresh.Database/Refresh.Database.csproj
+++ b/Refresh.Database/Refresh.Database.csproj
@@ -9,6 +9,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <PackageReference Include="JetBrains.Annotations" Version="2026.2.0" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="9.0.10" />
         <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="9.0.4" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="9.0.10">
diff --git a/Refresh.Interfaces.APIv3/Refresh.Interfaces.APIv3.csproj b/Refresh.Interfaces.APIv3/Refresh.Interfaces.APIv3.csproj
index 06dd949c3..c56b02335 100644
--- a/Refresh.Interfaces.APIv3/Refresh.Interfaces.APIv3.csproj
+++ b/Refresh.Interfaces.APIv3/Refresh.Interfaces.APIv3.csproj
@@ -11,6 +11,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <PackageReference Include="JetBrains.Annotations" Version="2026.2.0" />
       <ProjectReference Include="..\Refresh.Core\Refresh.Core.csproj" />
     </ItemGroup>
 
diff --git a/Refresh.Interfaces.Game/Refresh.Interfaces.Game.csproj b/Refresh.Interfaces.Game/Refresh.Interfaces.Game.csproj
index 4a42bbe59..fe1323ffa 100644
--- a/Refresh.Interfaces.Game/Refresh.Interfaces.Game.csproj
+++ b/Refresh.Interfaces.Game/Refresh.Interfaces.Game.csproj
@@ -11,6 +11,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <PackageReference Include="JetBrains.Annotations" Version="2026.2.0" />
         <ProjectReference Include="..\Refresh.Core\Refresh.Core.csproj" />
     </ItemGroup>
 
diff --git a/Refresh.Interfaces.Internal/Refresh.Interfaces.Internal.csproj b/Refresh.Interfaces.Internal/Refresh.Interfaces.Internal.csproj
index 4a42bbe59..fe1323ffa 100644
--- a/Refresh.Interfaces.Internal/Refresh.Interfaces.Internal.csproj
+++ b/Refresh.Interfaces.Internal/Refresh.Interfaces.Internal.csproj
@@ -11,6 +11,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <PackageReference Include="JetBrains.Annotations" Version="2026.2.0" />
         <ProjectReference Include="..\Refresh.Core\Refresh.Core.csproj" />
     </ItemGroup>
 
diff --git a/Refresh.Workers/Refresh.Workers.csproj b/Refresh.Workers/Refresh.Workers.csproj
index eb7166453..7191a9fe4 100644
--- a/Refresh.Workers/Refresh.Workers.csproj
+++ b/Refresh.Workers/Refresh.Workers.csproj
@@ -11,6 +11,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <PackageReference Include="JetBrains.Annotations" Version="2026.2.0" />
         <InternalsVisibleTo Include="RefreshTests.GameServer" />
         <ProjectReference Include="..\Refresh.Core\Refresh.Core.csproj" />
     </ItemGroup>