diff --git a/MBTiles/WPF/MBTiles.WPF.csproj b/MBTiles/WPF/MBTiles.WPF.csproj
index d0230023..dfffe899 100644
--- a/MBTiles/WPF/MBTiles.WPF.csproj
+++ b/MBTiles/WPF/MBTiles.WPF.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFrameworks>net8.0-windows;net462</TargetFrameworks>
+        <TargetFrameworks>net9.0-windows;net462</TargetFrameworks>
         <UseWPF>true</UseWPF>
         <DefineConstants>WPF</DefineConstants>
         <RootNamespace>MapControl.MBTiles</RootNamespace>
diff --git a/MapControl/WPF/MapControl.WPF.csproj b/MapControl/WPF/MapControl.WPF.csproj
index d7e23c15..e9682346 100644
--- a/MapControl/WPF/MapControl.WPF.csproj
+++ b/MapControl/WPF/MapControl.WPF.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFrameworks>net8.0-windows;net462</TargetFrameworks>
+        <TargetFrameworks>net9.0-windows;net462</TargetFrameworks>
         <LangVersion Condition="'$(TargetFramework)'=='net462'">8.0</LangVersion>
         <UseWPF>true</UseWPF>
         <DefineConstants>WPF</DefineConstants>
diff --git a/MapProjections/WPF/MapProjections.WPF.csproj b/MapProjections/WPF/MapProjections.WPF.csproj
index 6fbeb346..65a3f88c 100644
--- a/MapProjections/WPF/MapProjections.WPF.csproj
+++ b/MapProjections/WPF/MapProjections.WPF.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFrameworks>net8.0-windows;net462</TargetFrameworks>
+        <TargetFrameworks>net9.0-windows;net462</TargetFrameworks>
         <UseWPF>true</UseWPF>
         <DefineConstants>WPF</DefineConstants>
         <RootNamespace>MapControl.Projections</RootNamespace>
diff --git a/MapUiTools/WPF/MapUiTools.WPF.csproj b/MapUiTools/WPF/MapUiTools.WPF.csproj
index 28abd020..fc3b6507 100644
--- a/MapUiTools/WPF/MapUiTools.WPF.csproj
+++ b/MapUiTools/WPF/MapUiTools.WPF.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFrameworks>net8.0-windows;net462</TargetFrameworks>
+        <TargetFrameworks>net9.0-windows;net462</TargetFrameworks>
         <UseWPF>true</UseWPF>
         <DefineConstants>WPF</DefineConstants>
         <RootNamespace>MapControl.UiTools</RootNamespace>