diff --git a/Directory.Packages.props b/Directory.Packages.props
index 6db07974fdd9..b9f004239985 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -18,7 +18,7 @@
     <PackageVersion Include="Octokit" Version="13.0.1" />
     <PackageVersion Include="GitHubJwt" Version="0.0.6" />
     <PackageVersion Include="Mono.Cecil" Version="0.11.6" />
-    <PackageVersion Include="System.Collections.Immutable" Version="6.0.0" />
+    <PackageVersion Include="System.Collections.Immutable" Version="6.0.1" />
     <PackageVersion Include="System.Runtime.InteropServices.RuntimeInformation" Version="4.3.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageVersion Include="Google.Protobuf" Version="3.28.2" />
diff --git a/apis/Google.Cloud.Firestore/Google.Cloud.Firestore/Google.Cloud.Firestore.csproj b/apis/Google.Cloud.Firestore/Google.Cloud.Firestore/Google.Cloud.Firestore.csproj
index 43f54cdb9b4a..d5c88054e558 100644
--- a/apis/Google.Cloud.Firestore/Google.Cloud.Firestore/Google.Cloud.Firestore.csproj
+++ b/apis/Google.Cloud.Firestore/Google.Cloud.Firestore/Google.Cloud.Firestore.csproj
@@ -11,7 +11,7 @@
     <PackageReference Include="ConfigureAwaitChecker.Analyzer" PrivateAssets="All" />
     <ProjectReference Include="..\..\Google.Cloud.Firestore.V1\Google.Cloud.Firestore.V1\Google.Cloud.Firestore.V1.csproj" />
     <PackageReference Include="Grpc.Core" VersionOverride="[2.46.6, 3.0.0)" PrivateAssets="None" Condition="'$(TargetFramework)'=='net462'" />
-    <PackageReference Include="System.Collections.Immutable" />
+    <PackageReference Include="System.Collections.Immutable" VersionOverride="6.0.0" />
     <PackageReference Include="System.Linq.Async" />
   </ItemGroup>
   <ItemGroup>