diff --git a/PepLib.Dxf/PepLib.Dxf.csproj b/PepLib.Dxf/PepLib.Dxf.csproj
index 184d6a7..8fd92c6 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>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <TargetFrameworkProfile />
   </PropertyGroup>
diff --git a/PepLib.UI/App.config b/PepLib.UI/App.config
index bae5d6d..4bfa005 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=v4.6.1"/>
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8"/>
     </startup>
 </configuration>
diff --git a/PepLib.UI/PepLib.UI.csproj b/PepLib.UI/PepLib.UI.csproj
index dbc119f..3829096 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>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
diff --git a/PepLib.UI/Properties/Resources.Designer.cs b/PepLib.UI/Properties/Resources.Designer.cs
index 847d3a9..5d65c17 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", "15.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
     [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 cda7cb0..a6406d4 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", "15.8.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.5.0.0")]
     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.sln b/PepLib.sln
index 09835ac..53dccc1 100644
--- a/PepLib.sln
+++ b/PepLib.sln
@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.28307.329
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.33424.131
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PepLib", "PepLib\PepLib.csproj", "{22360453-B878-49FA-A5DC-0D9C577DE902}"
 EndProject