diff --git a/src/Uno.SourceGeneration.Host/Uno.SourceGeneration.Host.csproj b/src/Uno.SourceGeneration.Host/Uno.SourceGeneration.Host.csproj
index 9cd6ce7..eb8c58b 100644
--- a/src/Uno.SourceGeneration.Host/Uno.SourceGeneration.Host.csproj
+++ b/src/Uno.SourceGeneration.Host/Uno.SourceGeneration.Host.csproj
@@ -46,7 +46,10 @@
 	<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common">
 	  <Version>3.6.0</Version>
 	</PackageReference>
-    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="3.6.0" />
+	<PackageReference Include="System.Collections.Immutable">
+	  <Version>1.7.1</Version>
+	</PackageReference>
+	<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="3.6.0" />
     <PackageReference Include="Microsoft.VisualStudio.RemoteControl">
 	  <Version>14.0.262-masterA5CACE98</Version>
 	</PackageReference>
@@ -115,6 +118,9 @@
 	<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common">
 	  <Version>3.6.0</Version>
 	</PackageReference>
+	<PackageReference Include="System.Collections.Immutable">
+	  <Version>1.7.1</Version>
+	</PackageReference>
 	<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="3.6.0" />
 	<PackageReference Include="Microsoft.DiaSymReader" Version="1.3.0" />
 	<PackageReference Include="Microsoft.DiaSymReader.Native" Version="1.7.0" />