diff --git a/src/Our.Umbraco.DonutCaching.TestSite/packages.config b/src/Our.Umbraco.DonutCaching.TestSite/packages.config
index a948c14..97120a2 100644
--- a/src/Our.Umbraco.DonutCaching.TestSite/packages.config
+++ b/src/Our.Umbraco.DonutCaching.TestSite/packages.config
@@ -54,7 +54,7 @@
   <package id="Serilog.Formatting.Compact.Reader" version="1.0.3" targetFramework="net472" />
   <package id="Serilog.Settings.AppSettings" version="2.2.2" targetFramework="net472" />
   <package id="Serilog.Sinks.File" version="4.0.0" targetFramework="net472" />
-  <package id="SharpZipLib" version="0.86.0" targetFramework="net472" />
+  <package id="SharpZipLib" version="1.3.3" targetFramework="net472" />
   <package id="Superpower" version="2.0.0" targetFramework="net472" />
   <package id="System.AppContext" version="4.3.0" targetFramework="net472" />
   <package id="System.Collections" version="4.3.0" targetFramework="net472" />