diff --git a/DayPilot.csproj b/DayPilot.csproj
index 2e6f836..db42d08 100644
--- a/DayPilot.csproj
+++ b/DayPilot.csproj
@@ -15,7 +15,7 @@
     <OldToolsVersion>3.5</OldToolsVersion>
     <UpgradeBackupLocation>
     </UpgradeBackupLocation>
-    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <TargetFrameworkProfile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
diff --git a/Properties/Settings.Designer.cs b/Properties/Settings.Designer.cs
index e21ed54..dfcf45b 100644
--- a/Properties/Settings.Designer.cs
+++ b/Properties/Settings.Designer.cs
@@ -12,7 +12,7 @@ namespace DayPilot.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "16.0.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "16.2.0.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
diff --git a/app.config b/app.config
index 24698b8..e8cc056 100644
--- a/app.config
+++ b/app.config
@@ -5,4 +5,4 @@
     <connectionStrings>
         <add name="DayPilot.Properties.Settings.bookingsConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\bookings.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/>
     </connectionStrings>
-<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2"/></startup></configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/></startup></configuration>