diff --git a/Swifter.Test/Swifter.Test.csproj b/Swifter.Test/Swifter.Test.csproj
index addbd0d..0f8e2f9 100644
--- a/Swifter.Test/Swifter.Test.csproj
+++ b/Swifter.Test/Swifter.Test.csproj
@@ -17,7 +17,7 @@
     <PackageReference Include="LitJson" Version="0.15.0" />
     <PackageReference Include="NetJSON" Version="1.3.2" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="ServiceStack" Version="5.7.0" />
+    <PackageReference Include="ServiceStack" Version="5.9.2" />
     <PackageReference Include="Utf8Json" Version="1.3.7" />
   </ItemGroup>