diff --git a/src/Tenekon.Extensions.CommandLine.PolyType/Tenekon.Extensions.CommandLine.PolyType.csproj b/src/Tenekon.Extensions.CommandLine.PolyType/Tenekon.Extensions.CommandLine.PolyType.csproj
index 035886f..ffd8c6e 100644
--- a/src/Tenekon.Extensions.CommandLine.PolyType/Tenekon.Extensions.CommandLine.PolyType.csproj
+++ b/src/Tenekon.Extensions.CommandLine.PolyType/Tenekon.Extensions.CommandLine.PolyType.csproj
@@ -35,7 +35,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="System.Collections.Immutable" Version="10.0.3"/>
+        <PackageReference Include="System.Collections.Immutable" Version="10.0.5"/>
         <PackageReference Include="PolyType" Version="1.1.1"/>
         <PackageReference Include="System.CommandLine" Version="2.0.3"/>
         <PackageReference Include="Tenekon.MethodOverloads.SourceGenerator" Version="0.0.6-alpha.6">