diff --git a/Directory.Packages.props b/Directory.Packages.props
index 3209c6620..c5cbabbc7 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -6,7 +6,7 @@
     <GrpcVersion>2.57.0</GrpcVersion>
     <GrpcCCoreVersion>2.46.6</GrpcCCoreVersion>
     <MemoryPackVersion>1.21.1</MemoryPackVersion>
-    <MessagePackVersion>2.5.129</MessagePackVersion>
+    <MessagePackVersion>2.5.187</MessagePackVersion>
     <MicrosoftCodeAnalysisVersion>4.3.1</MicrosoftCodeAnalysisVersion>
     <MicrosoftCodeAnalysisVersionUnity>3.9.0</MicrosoftCodeAnalysisVersionUnity>
   </PropertyGroup>