diff --git a/src/ErrorHelper.Tests/ErrorHelper.Tests.csproj b/src/ErrorHelper.Tests/ErrorHelper.Tests.csproj
index 8d71c7b..ac5066f 100644
--- a/src/ErrorHelper.Tests/ErrorHelper.Tests.csproj
+++ b/src/ErrorHelper.Tests/ErrorHelper.Tests.csproj
@@ -49,7 +49,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="MessagePack">
-      <Version>3.0.300</Version>
+      <Version>3.1.0</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.IO.Redist">
       <Version>6.1.0</Version>
diff --git a/src/ErrorHelper.csproj b/src/ErrorHelper.csproj
index 100be70..b9444ae 100644
--- a/src/ErrorHelper.csproj
+++ b/src/ErrorHelper.csproj
@@ -89,7 +89,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="MessagePack">
-      <Version>3.0.300</Version>
+      <Version>3.1.0</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.ApplicationInsights">
       <Version>2.22.0</Version>