diff --git a/src/WeatherCalendar/WeatherCalendar.csproj b/src/WeatherCalendar/WeatherCalendar.csproj
index 8a185e1..d130b5a 100644
--- a/src/WeatherCalendar/WeatherCalendar.csproj
+++ b/src/WeatherCalendar/WeatherCalendar.csproj
@@ -37,7 +37,7 @@
         <PackageReference Include="NPinyin.Core" Version="3.0.0" />
         <PackageReference Include="ReactiveUI.Events.WPF" Version="15.1.1" />
         <PackageReference Include="ReactiveUI.Fody" Version="19.5.41" />
-        <PackageReference Include="ReactiveUI.Validation" Version="3.1.7" />
+        <PackageReference Include="ReactiveUI.Validation" Version="4.0.9" />
         <PackageReference Include="ReactiveUI.WPF" Version="20.0.1" />
         <PackageReference Include="System.Management" Version="8.0.0" />
         <PackageReference Include="System.Reactive.Linq" Version="6.0.0" />