diff --git a/PropertyChangedAnalyzers.Test/PropertyChangedAnalyzers.Test.csproj b/PropertyChangedAnalyzers.Test/PropertyChangedAnalyzers.Test.csproj
index 1745c96b..ed30a440 100644
--- a/PropertyChangedAnalyzers.Test/PropertyChangedAnalyzers.Test.csproj
+++ b/PropertyChangedAnalyzers.Test/PropertyChangedAnalyzers.Test.csproj
@@ -23,7 +23,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Caliburn.Micro" Version="3.2" />
+    <PackageReference Include="Caliburn.Micro" Version="4.0.212" />
     <PackageReference Include="Gu.Analyzers" Version="2.0.3" PrivateAssets="all" />
     <PackageReference Include="Gu.Roslyn.Asserts" Version="4.3.0" />
     <PackageReference Include="Gu.Roslyn.Asserts.Analyzers" Version="4.0.0" PrivateAssets="all" />
diff --git a/ValidCode/ValidCode.csproj b/ValidCode/ValidCode.csproj
index a30acbd6..cb329dd7 100644
--- a/ValidCode/ValidCode.csproj
+++ b/ValidCode/ValidCode.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net6.0-windows</TargetFramework>
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Caliburn.Micro" Version="3.2" />
+    <PackageReference Include="Caliburn.Micro" Version="4.0.212" />
     <PackageReference Include="Gu.Wpf.Reactive" Version="5.0.1" />
     <PackageReference Include="MvvmCross" Version="9.0.9" />
     <PackageReference Include="MvvmLightLibs" Version="5.4.1.1" />