diff --git a/BackPressureExample/BackPressure.AppHost/BackPressure.AppHost.csproj b/BackPressureExample/BackPressure.AppHost/BackPressure.AppHost.csproj
index 97f0987f..9ae261b5 100644
--- a/BackPressureExample/BackPressure.AppHost/BackPressure.AppHost.csproj
+++ b/BackPressureExample/BackPressure.AppHost/BackPressure.AppHost.csproj
@@ -14,6 +14,7 @@
 		<PackageReference Include="Aspire.Hosting.AppHost" Version="9.5.1" />
 		<PackageReference Include="Aspire.Hosting.Kafka" Version="9.5.1" />
 		<PackageReference Include="Aspire.Confluent.Kafka" Version="9.5.1" />
+		<PackageReference Include="MessagePack" Version="2.5.301" />
 	</ItemGroup>
 
 
diff --git a/BackPressureExample/BackPressure.Common/BackPressure.Common.csproj b/BackPressureExample/BackPressure.Common/BackPressure.Common.csproj
index 575f95e6..09b97f18 100644
--- a/BackPressureExample/BackPressure.Common/BackPressure.Common.csproj
+++ b/BackPressureExample/BackPressure.Common/BackPressure.Common.csproj
@@ -9,6 +9,7 @@
   <ItemGroup>
     <PackageReference Include="Confluent.Kafka" Version="2.11.0" />
     <PackageReference Include="Aspire.Hosting" Version="9.5.1" />
+    <PackageReference Include="MessagePack" Version="2.5.301" />
   </ItemGroup>
 
 </Project>
diff --git a/LearningCourse/Day10-Performance-Optimization-Scaling/Exercise-Solutions/Exercise104/Exercise104.csproj b/LearningCourse/Day10-Performance-Optimization-Scaling/Exercise-Solutions/Exercise104/Exercise104.csproj
index 7f8f7c4b..36e1232d 100644
--- a/LearningCourse/Day10-Performance-Optimization-Scaling/Exercise-Solutions/Exercise104/Exercise104.csproj
+++ b/LearningCourse/Day10-Performance-Optimization-Scaling/Exercise-Solutions/Exercise104/Exercise104.csproj
@@ -16,7 +16,7 @@
     <PackageReference Include="Confluent.Kafka" Version="2.3.0" />
     
     <!-- Serialization -->
-    <PackageReference Include="MessagePack" Version="2.5.187" />
+    <PackageReference Include="MessagePack" Version="2.5.301" />
     
     <!-- Logging -->
     <PackageReference Include="Serilog" Version="3.1.1" />