diff --git a/Benchmark/Benchmark.csproj b/Benchmark/Benchmark.csproj
index 146d417..885eb5b 100644
--- a/Benchmark/Benchmark.csproj
+++ b/Benchmark/Benchmark.csproj
@@ -19,7 +19,7 @@
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-    <PackageReference Include="MessagePack.ImmutableCollection" Version="2.3.85" />
+    <PackageReference Include="MessagePack.ImmutableCollection" Version="2.5.108" />
     <PackageReference Include="NetSerializer" Version="4.1.1" />
     <PackageReference Include="protobuf-net" Version="2.4.6" />
     <PackageReference Include="ZeroFormatter" Version="1.6.4" />