diff --git a/Bcfier.XbimXplorer/packages.config b/Bcfier.XbimXplorer/packages.config
index 192c7158..3fd545bd 100644
--- a/Bcfier.XbimXplorer/packages.config
+++ b/Bcfier.XbimXplorer/packages.config
@@ -5,7 +5,7 @@
   <package id="log4net" version="2.0.5" targetFramework="net452" />
   <package id="ManagedEsent" version="1.9.4" targetFramework="net452" />
   <package id="PropertyTools.Wpf" version="2015.1.66" targetFramework="net452" />
-  <package id="SharpZipLib" version="0.86.0" targetFramework="net452" />
+  <package id="SharpZipLib" version="1.3.3" targetFramework="net452" />
   <package id="Xbim.Essentials" version="4.0.7" targetFramework="net452" />
   <package id="Xbim.Geometry" version="4.0.11" targetFramework="net452" />
   <package id="Xbim.WindowsUI" version="4.0.11" targetFramework="net452" />