diff --git a/src/NetTestRegimentation.XUnit/NetTestRegimentation.XUnit.csproj b/src/NetTestRegimentation.XUnit/NetTestRegimentation.XUnit.csproj
index 159418a..28bfbae 100644
--- a/src/NetTestRegimentation.XUnit/NetTestRegimentation.XUnit.csproj
+++ b/src/NetTestRegimentation.XUnit/NetTestRegimentation.XUnit.csproj
@@ -10,7 +10,7 @@
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-    <PackageReference Include="System.Collections.Immutable" Version="9.0.9" />
+    <PackageReference Include="System.Collections.Immutable" Version="9.0.12" />
     <PackageReference Include="System.Reactive" Version="6.1.0" />
     <PackageReference Include="xunit.v3.extensibility.core" Version="3.2.2" />
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