diff --git a/BlazorServer/BlazorServer.csproj b/BlazorServer/BlazorServer.csproj
index ff4432884..88d263823 100644
--- a/BlazorServer/BlazorServer.csproj
+++ b/BlazorServer/BlazorServer.csproj
@@ -9,6 +9,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <PlatformTarget>x86</PlatformTarget>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
   <ItemGroup>