diff --git a/Directory.Packages.props b/Directory.Packages.props
index e5591de..f1a5978 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -67,7 +67,6 @@
     <PackageVersion Include="Npgsql" Version="9.0.2" />
     <PackageVersion Include="Polly.Core" Version="8.6.5" />
     <PackageVersion Include="Spectre.Console" Version="0.55.0" />
-    <PackageVersion Include="System.Collections.Immutable" Version="9.0.0" />
   </ItemGroup>
 
   <!--
diff --git a/src/CodegenTests/CodegenTests.csproj b/src/CodegenTests/CodegenTests.csproj
index 697b779..c71aa1f 100644
--- a/src/CodegenTests/CodegenTests.csproj
+++ b/src/CodegenTests/CodegenTests.csproj
@@ -9,7 +9,6 @@
         <PackageReference Include="coverlet.collector" />
         <PackageReference Include="FSharp.Core" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" />
-        <PackageReference Include="System.Collections.Immutable" />
         <PackageReference Include="xunit.v3" />
         <PackageReference Include="xunit.runner.visualstudio">
           <PrivateAssets>all</PrivateAssets>