diff --git a/ICSharpCode.AvalonEdit.Tests/ICSharpCode.AvalonEdit.Tests.csproj b/ICSharpCode.AvalonEdit.Tests/ICSharpCode.AvalonEdit.Tests.csproj
index 3697ef1..dcd2e68 100644
--- a/ICSharpCode.AvalonEdit.Tests/ICSharpCode.AvalonEdit.Tests.csproj
+++ b/ICSharpCode.AvalonEdit.Tests/ICSharpCode.AvalonEdit.Tests.csproj
@@ -7,7 +7,7 @@
     <OutputType>Library</OutputType>
     <RootNamespace>ICSharpCode.AvalonEdit</RootNamespace>
     <AssemblyName>ICSharpCode.AvalonEdit.Tests</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <SourceAnalysisOverrideSettingsFile>"C:\Program Files\SharpDevelop\3.0\bin\..\AddIns\AddIns\Misc\SourceAnalysis\Settings.SourceAnalysis"</SourceAnalysisOverrideSettingsFile>
     <SignAssembly>True</SignAssembly>
@@ -20,7 +20,8 @@
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <OutputPath>..\..\..\..\bin\UnitTests\</OutputPath>
     <RunPostBuildEvent>OnBuildSuccess</RunPostBuildEvent>
-    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
+    <TargetFrameworkProfile>
+    </TargetFrameworkProfile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <DebugSymbols>true</DebugSymbols>
diff --git a/ICSharpCode.AvalonEdit.Tests/app.config b/ICSharpCode.AvalonEdit.Tests/app.config
index c5b0892..03d6e39 100644
--- a/ICSharpCode.AvalonEdit.Tests/app.config
+++ b/ICSharpCode.AvalonEdit.Tests/app.config
@@ -6,7 +6,7 @@
 		</sectionGroup>
 	</configSections>
 	<startup>
-		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0,Profile=Client" />
+		<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
 	</startup>
 	<NUnit>
 		<TestRunner>
diff --git a/ICSharpCode.AvalonEdit/ICSharpCode.AvalonEdit.csproj b/ICSharpCode.AvalonEdit/ICSharpCode.AvalonEdit.csproj
index d4d2930..56d8ea7 100644
--- a/ICSharpCode.AvalonEdit/ICSharpCode.AvalonEdit.csproj
+++ b/ICSharpCode.AvalonEdit/ICSharpCode.AvalonEdit.csproj
@@ -7,7 +7,7 @@
     <OutputType>Library</OutputType>
     <RootNamespace>ICSharpCode.AvalonEdit</RootNamespace>
     <AssemblyName>ICSharpCode.AvalonEdit</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <SourceAnalysisOverrideSettingsFile>"C:\Program Files\SharpDevelop\3.0\bin\..\AddIns\AddIns\Misc\SourceAnalysis\Settings.SourceAnalysis"</SourceAnalysisOverrideSettingsFile>
     <AllowUnsafeBlocks>False</AllowUnsafeBlocks>
@@ -23,7 +23,8 @@
     <OutputPath>..\..\..\..\bin\</OutputPath>
     <DocumentationFile>..\..\..\..\bin\ICSharpCode.AvalonEdit.xml</DocumentationFile>
     <NoWarn>1607</NoWarn>
-    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
+    <TargetFrameworkProfile>
+    </TargetFrameworkProfile>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <DebugSymbols>true</DebugSymbols>