diff --git a/PepLib.Dxf/PepLib.Dxf.csproj b/PepLib.Dxf/PepLib.Dxf.csproj
index 1412bcb..11d81b5 100644
--- a/PepLib.Dxf/PepLib.Dxf.csproj
+++ b/PepLib.Dxf/PepLib.Dxf.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>PepLib.Dxf</RootNamespace>
     <AssemblyName>PepLib.Dxf</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>
@@ -21,6 +21,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -29,6 +30,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="netDxf">
diff --git a/PepLib.UI/App.config b/PepLib.UI/App.config
index 74ade9d..bae5d6d 100644
--- a/PepLib.UI/App.config
+++ b/PepLib.UI/App.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
     </startup>
 </configuration>
diff --git a/PepLib.UI/PepLib.UI.csproj b/PepLib.UI/PepLib.UI.csproj
index 50d2e0c..dbc119f 100644
--- a/PepLib.UI/PepLib.UI.csproj
+++ b/PepLib.UI/PepLib.UI.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>PepLib.UI</RootNamespace>
     <AssemblyName>PepLib.UI</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
@@ -23,6 +23,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -32,6 +33,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup>
     <StartupObject />
diff --git a/PepLib.UI/Properties/Resources.Designer.cs b/PepLib.UI/Properties/Resources.Designer.cs
index 5de725f..847d3a9 100644
--- a/PepLib.UI/Properties/Resources.Designer.cs
+++ b/PepLib.UI/Properties/Resources.Designer.cs
@@ -19,7 +19,7 @@ namespace PepLib.UI.Properties {
     // class via a tool like ResGen or Visual Studio.
     // To add or remove a member, edit your .ResX file then rerun ResGen
     // with the /str option, or rebuild your VS project.
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "15.0.0.0")]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
     internal class Resources {
diff --git a/PepLib.UI/Properties/Settings.Designer.cs b/PepLib.UI/Properties/Settings.Designer.cs
index 61c12e1..cda7cb0 100644
--- a/PepLib.UI/Properties/Settings.Designer.cs
+++ b/PepLib.UI/Properties/Settings.Designer.cs
@@ -12,7 +12,7 @@ namespace PepLib.UI.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "14.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "15.8.0.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
diff --git a/PepLib/PepLib.csproj b/PepLib/PepLib.csproj
index 342f759..e093a63 100644
--- a/PepLib/PepLib.csproj
+++ b/PepLib/PepLib.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>PepLib</RootNamespace>
     <AssemblyName>PepLib</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>
@@ -21,6 +21,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -29,10 +30,11 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
-    <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 Include="DotNetZip, Version=1.12.0.0, Culture=neutral, PublicKeyToken=6583c7c814667745, processorArchitecture=MSIL">
+      <HintPath>..\packages\DotNetZip.1.12.0\lib\net20\DotNetZip.dll</HintPath>
     </Reference>
     <Reference Include="System" />
   </ItemGroup>
diff --git a/PepLib/packages.config b/PepLib/packages.config
index 78c599f..fa0019f 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="1.11.0" targetFramework="net40" />
+  <package id="DotNetZip" version="1.12.0" targetFramework="net461" />
 </packages>
\ No newline at end of file