diff --git a/src/FactSet.SDK.Utils/FactSet.SDK.Utils.csproj b/src/FactSet.SDK.Utils/FactSet.SDK.Utils.csproj
index 2686125..57c2bcb 100644
--- a/src/FactSet.SDK.Utils/FactSet.SDK.Utils.csproj
+++ b/src/FactSet.SDK.Utils/FactSet.SDK.Utils.csproj
@@ -21,7 +21,7 @@
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-    <PackageReference Include="System.Collections.Immutable" Version="7.0.0" />
+    <PackageReference Include="System.Collections.Immutable" Version="9.0.10" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="6.34.0" />
     <None Include="../../README.md" Pack="true" PackagePath="\" />
   </ItemGroup>