diff --git a/src/samples/EventSourcingIntro/EventSourcingIntro.csproj b/src/samples/EventSourcingIntro/EventSourcingIntro.csproj
index 1c9db9867e..b49c0e3342 100644
--- a/src/samples/EventSourcingIntro/EventSourcingIntro.csproj
+++ b/src/samples/EventSourcingIntro/EventSourcingIntro.csproj
@@ -5,6 +5,7 @@
         <TargetFramework>net9.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <LangVersion>latest</LangVersion>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     </PropertyGroup>
 
     <ItemGroup>