diff --git a/src/RestFiles/RestFiles.Tests/packages.config b/src/RestFiles/RestFiles.Tests/packages.config
index b77f7728..9a1ecab6 100644
--- a/src/RestFiles/RestFiles.Tests/packages.config
+++ b/src/RestFiles/RestFiles.Tests/packages.config
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="NUnit" version="3.5.0" targetFramework="net45" />
-  <package id="ServiceStack" version="4.5.0" targetFramework="net45" />
+  <package id="ServiceStack" version="5.9.2" targetFramework="net45" />
   <package id="ServiceStack.Client" version="4.5.0" targetFramework="net45" />
   <package id="ServiceStack.Common" version="4.5.0" targetFramework="net45" />
   <package id="ServiceStack.Interfaces" version="4.5.0" targetFramework="net45" />