diff --git a/SafeExamBrowser.Client/SafeExamBrowser.Client.csproj b/SafeExamBrowser.Client/SafeExamBrowser.Client.csproj
index 4a87c0ad..f629cba2 100644
--- a/SafeExamBrowser.Client/SafeExamBrowser.Client.csproj
+++ b/SafeExamBrowser.Client/SafeExamBrowser.Client.csproj
@@ -150,7 +150,7 @@
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
-    <PostBuildEvent>xcopy "$(SolutionDir)SafeExamBrowser.Browser\bin\$(PlatformName)\$(ConfigurationName)" "$(ProjectDir)bin\$(PlatformName)\$(ConfigurationName)" /e /y</PostBuildEvent>
+    <PostBuildEvent>xcopy "$(SolutionDir)SafeExamBrowser.Browser\bin\$(PlatformName)\$(ConfigurationName)" "$(ProjectDir)bin\$(PlatformName)\$(ConfigurationName)" /d /e /i /y</PostBuildEvent>
   </PropertyGroup>
   <PropertyGroup>
     <PreBuildEvent>
diff --git a/SafeExamBrowser.Runtime/SafeExamBrowser.Runtime.csproj b/SafeExamBrowser.Runtime/SafeExamBrowser.Runtime.csproj
index 957d666f..be521c52 100644
--- a/SafeExamBrowser.Runtime/SafeExamBrowser.Runtime.csproj
+++ b/SafeExamBrowser.Runtime/SafeExamBrowser.Runtime.csproj
@@ -164,7 +164,7 @@
   <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
-    <PostBuildEvent>xcopy "$(SolutionDir)SafeExamBrowser.Client\bin\$(PlatformName)\$(ConfigurationName)" "$(ProjectDir)bin\$(PlatformName)\$(ConfigurationName)" /e /y</PostBuildEvent>
+    <PostBuildEvent>xcopy "$(SolutionDir)SafeExamBrowser.Client\bin\$(PlatformName)\$(ConfigurationName)" "$(ProjectDir)bin\$(PlatformName)\$(ConfigurationName)" /d /e /i /y</PostBuildEvent>
   </PropertyGroup>
   <PropertyGroup>
     <PreBuildEvent>