diff --git a/Directory.Packages.props b/Directory.Packages.props
index 5c36a11..c309363 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -7,7 +7,7 @@
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="5.6.0" />
     <!-- Serializers -->
-    <PackageVersion Include="MessagePack" Version="3.1.7" />
+    <PackageVersion Include="MessagePack" Version="3.1.8" />
     <!-- MessagePack 3.x bundles the source generator; no separate MessagePack.SourceGenerator package exists for 3.x -->
     <PackageVersion Include="MemoryPack" Version="1.21.4" />
     <!-- OpenAPI -->