diff --git a/PepLib/PepLib.csproj b/PepLib/PepLib.csproj
index 7f8096d..342f759 100644
--- a/PepLib/PepLib.csproj
+++ b/PepLib/PepLib.csproj
@@ -31,9 +31,8 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="DotNetZip, Version=1.10.1.0, Culture=neutral, PublicKeyToken=6583c7c814667745, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\DotNetZip.1.10.1\lib\net20\DotNetZip.dll</HintPath>
-      <Private>True</Private>
+    <Reference Include="DotNetZip, Version=1.11.0.0, Culture=neutral, PublicKeyToken=6583c7c814667745, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\DotNetZip.1.11.0\lib\net20\DotNetZip.dll</HintPath>
     </Reference>
     <Reference Include="System" />
   </ItemGroup>
diff --git a/PepLib/packages.config b/PepLib/packages.config
index 910ba14..78c599f 100644
--- a/PepLib/packages.config
+++ b/PepLib/packages.config
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="DotNetZip" version="1.10.1" targetFramework="net40" />
+  <package id="DotNetZip" version="1.11.0" targetFramework="net40" />
 </packages>
\ No newline at end of file