diff --git a/AssemblyServer-x64/AssemblyServer-x64.csproj b/AssemblyServer-x64/AssemblyServer-x64.csproj
index 68b91d4a..ec8b78ec 100644
--- a/AssemblyServer-x64/AssemblyServer-x64.csproj
+++ b/AssemblyServer-x64/AssemblyServer-x64.csproj
@@ -33,6 +33,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
diff --git a/AssemblyServer/AssemblyServer.csproj b/AssemblyServer/AssemblyServer.csproj
index 5a3c0394..b1b5b7fc 100644
--- a/AssemblyServer/AssemblyServer.csproj
+++ b/AssemblyServer/AssemblyServer.csproj
@@ -33,6 +33,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
diff --git a/blocks/blocks.csproj b/blocks/blocks.csproj
index 06dd36d9..a74b95da 100644
--- a/blocks/blocks.csproj
+++ b/blocks/blocks.csproj
@@ -31,6 +31,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="BaseBlock.cs" />
diff --git a/de4dot-x64/de4dot-x64.csproj b/de4dot-x64/de4dot-x64.csproj
index 5214f324..59053ba9 100644
--- a/de4dot-x64/de4dot-x64.csproj
+++ b/de4dot-x64/de4dot-x64.csproj
@@ -33,6 +33,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />
diff --git a/de4dot/de4dot.csproj b/de4dot/de4dot.csproj
index f809ebcb..cb18e319 100644
--- a/de4dot/de4dot.csproj
+++ b/de4dot/de4dot.csproj
@@ -33,6 +33,7 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Program.cs" />