diff --git a/src/ErrorHelper.Tests/ErrorHelper.Tests.csproj b/src/ErrorHelper.Tests/ErrorHelper.Tests.csproj
index 40d8153..867fc25 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>3.1.0</Version>
+      <Version>3.1.1</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.IO.Redist">
       <Version>6.1.0</Version>
diff --git a/src/ErrorHelper.csproj b/src/ErrorHelper.csproj
index b9444ae..e045364 100644
--- a/src/ErrorHelper.csproj
+++ b/src/ErrorHelper.csproj
@@ -89,7 +89,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="MessagePack">
-      <Version>3.1.0</Version>
+      <Version>3.1.1</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.ApplicationInsights">
       <Version>2.22.0</Version>