diff --git a/src/ProjectDiff.Core/ProjectDiff.Core.csproj b/src/ProjectDiff.Core/ProjectDiff.Core.csproj
index 8aa6c84..5dea840 100644
--- a/src/ProjectDiff.Core/ProjectDiff.Core.csproj
+++ b/src/ProjectDiff.Core/ProjectDiff.Core.csproj
@@ -30,6 +30,7 @@
     </ItemGroup>
 
     <ItemGroup>
+      <PackageReference Include="System.Collections.Immutable" Version="10.0.0" />
         <None Include="README.md" Pack="true" PackagePath="\"/>
     </ItemGroup>
 </Project>
diff --git a/test/ProjectDiff.Tests/ProjectDiff.Tests.csproj b/test/ProjectDiff.Tests/ProjectDiff.Tests.csproj
index 3074f16..18d097a 100644
--- a/test/ProjectDiff.Tests/ProjectDiff.Tests.csproj
+++ b/test/ProjectDiff.Tests/ProjectDiff.Tests.csproj
@@ -15,7 +15,7 @@
 
         <PackageReference Include="coverlet.collector" Version="6.0.4"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1"/>
-        <PackageReference Include="System.Collections.Immutable" Version="9.0.8"/>
+        <PackageReference Include="System.Collections.Immutable" Version="10.0.0"/>
         <PackageReference Include="System.IO.Pipelines" Version="9.0.8" />
         <PackageReference Include="Verify.XunitV3" Version="30.7.3"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4">