diff --git a/src/GitTools.Core/Exceptions/WarningException.cs b/src/GitTools.Core/Exceptions/WarningException.cs
index fff3cc6..0fb19a9 100644
--- a/src/GitTools.Core/Exceptions/WarningException.cs
+++ b/src/GitTools.Core/Exceptions/WarningException.cs
@@ -10,11 +10,5 @@ public WarningException(string message)
             : base(message)
         {
         }
-
-        
-        protected WarningException(SerializationInfo info, StreamingContext context)
-            : base(info, context)
-        {
-        }
     }
 }
\ No newline at end of file
diff --git a/src/GitTools.Core/GitTools.Core.csproj b/src/GitTools.Core/GitTools.Core.csproj
index 3985d17..a1cdc36 100644
--- a/src/GitTools.Core/GitTools.Core.csproj
+++ b/src/GitTools.Core/GitTools.Core.csproj
@@ -10,6 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="JetBrains.Annotations" Version="10.4.0" />
     <PackageReference Include="Microsoft.CSharp" Version="4.3.0" />
     <PackageReference Include="System.Dynamic.Runtime" Version="4.3.0" />
     <PackageReference Include="System.Runtime.Serialization.Primitives" Version="4.3.0" />