diff --git a/Unit Tests/Lucinq.Solr.UnitTests/packages.config b/Unit Tests/Lucinq.Solr.UnitTests/packages.config
index 0be71ad..092363d 100644
--- a/Unit Tests/Lucinq.Solr.UnitTests/packages.config	
+++ b/Unit Tests/Lucinq.Solr.UnitTests/packages.config	
@@ -4,7 +4,7 @@
   <package id="CommonServiceLocator" version="2.0.2" targetFramework="net46" />
   <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net46" />
   <package id="NUnit" version="3.11.0" targetFramework="net45" />
-  <package id="SharpZipLib" version="0.86.0" targetFramework="net40" />
+  <package id="SharpZipLib" version="1.3.3" targetFramework="net40" />
   <package id="SolrNet" version="1.0.19" targetFramework="net46" />
   <package id="SolrNet.Core" version="1.0.19" targetFramework="net46" />
   <package id="System.ValueTuple" version="4.4.0" targetFramework="net46" />