diff --git a/src/Orchard.Tests.Modules/Orchard.Tests.Modules.csproj b/src/Orchard.Tests.Modules/Orchard.Tests.Modules.csproj
index 394f94b8d..19e74635a 100644
--- a/src/Orchard.Tests.Modules/Orchard.Tests.Modules.csproj
+++ b/src/Orchard.Tests.Modules/Orchard.Tests.Modules.csproj
@@ -83,8 +83,8 @@
       <HintPath>..\packages\Iesi.Collections.4.0.1.4000\lib\net40\Iesi.Collections.dll</HintPath>
       <Private>True</Private>
     </Reference>
-    <Reference Include="Ionic.Zip, Version=1.9.1.8, Culture=neutral, PublicKeyToken=edbe51ad942a3f5c, processorArchitecture=MSIL">
-      <HintPath>..\packages\DotNetZip.1.9.1.8\lib\net20\Ionic.Zip.dll</HintPath>
+    <Reference Include="DotNetZip">
+      <HintPath>..\packages\DotNetZip.1.12.0\lib\net20\DotNetZip.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="IronRuby, Version=1.1.3.0, Culture=neutral, PublicKeyToken=7f709c5b713576e1, processorArchitecture=MSIL">
diff --git a/src/Orchard.Tests.Modules/packages.config b/src/Orchard.Tests.Modules/packages.config
index e95871a90..56b374523 100644
--- a/src/Orchard.Tests.Modules/packages.config
+++ b/src/Orchard.Tests.Modules/packages.config
@@ -2,7 +2,7 @@
 <packages>
   <package id="Autofac" version="3.5.2" targetFramework="net452" />
   <package id="Castle.Core" version="3.3.1" targetFramework="net452" />
-  <package id="DotNetZip" version="1.9.1.8" targetFramework="net452" />
+  <package id="DotNetZip" version="1.12" targetFramework="net452" />
   <package id="FluentNHibernate" version="2.0.3.0" targetFramework="net452" />
   <package id="Iesi.Collections" version="4.0.1.4000" targetFramework="net452" />
   <package id="IronRuby" version="1.1.3" targetFramework="net452" />
diff --git a/src/Orchard.Web/Modules/Orchard.Media/Orchard.Media.csproj b/src/Orchard.Web/Modules/Orchard.Media/Orchard.Media.csproj
index 6b9ee48ae..a6bdcb030 100644
--- a/src/Orchard.Web/Modules/Orchard.Media/Orchard.Media.csproj
+++ b/src/Orchard.Web/Modules/Orchard.Media/Orchard.Media.csproj
@@ -26,6 +26,7 @@
     <IISExpressWindowsAuthentication />
     <IISExpressUseClassicPipelineMode />
     <UseGlobalApplicationHostFile />
+    <Use64BitIISExpress />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -51,8 +52,8 @@
     <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="Ionic.Zip, Version=1.9.1.8, Culture=neutral, PublicKeyToken=edbe51ad942a3f5c, processorArchitecture=MSIL">
-      <HintPath>..\..\..\packages\DotNetZip.1.9.1.8\lib\net20\Ionic.Zip.dll</HintPath>
+    <Reference Include="DotNetZip">
+      <HintPath>..\..\..\packages\DotNetZip.1.12.0\lib\net20\DotNetZip.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
diff --git a/src/Orchard.Web/Modules/Orchard.Media/packages.config b/src/Orchard.Web/Modules/Orchard.Media/packages.config
index b348d8201..660825412 100644
--- a/src/Orchard.Web/Modules/Orchard.Media/packages.config
+++ b/src/Orchard.Web/Modules/Orchard.Media/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="DotNetZip" version="1.9.1.8" targetFramework="net452" />
+  <package id="DotNetZip" version="1.12" targetFramework="net452" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.3" targetFramework="net452" />
   <package id="Microsoft.AspNet.Razor" version="3.2.3" targetFramework="net452" />
   <package id="Microsoft.AspNet.WebPages" version="3.2.3" targetFramework="net452" />