diff --git a/src/ReactiveUI.Fody.Analyzer/ReactiveUI.Fody.Analyzer.csproj b/src/ReactiveUI.Fody.Analyzer/ReactiveUI.Fody.Analyzer.csproj
index 0c8afde666..b7aeaf63ae 100644
--- a/src/ReactiveUI.Fody.Analyzer/ReactiveUI.Fody.Analyzer.csproj
+++ b/src/ReactiveUI.Fody.Analyzer/ReactiveUI.Fody.Analyzer.csproj
@@ -12,7 +12,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="2.9.3" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.2.1" PrivateAssets="all" />
-    <PackageReference Include="System.Collections.Immutable" Version="1.5.0" />
+    <PackageReference Include="System.Collections.Immutable" Version="1.6.0" />
   </ItemGroup>
 
   <ItemGroup>