diff --git a/ClosedXML/ClosedXML.csproj b/ClosedXML/ClosedXML.csproj
index 7299c59..76984c8 100644
--- a/ClosedXML/ClosedXML.csproj
+++ b/ClosedXML/ClosedXML.csproj
@@ -14,6 +14,7 @@
     <RepositoryUrl>https://github.com/ClosedXML/ClosedXML</RepositoryUrl>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>ClosedXML.snk</AssemblyOriginatorKeyFile>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <NoWarn>$(NoWarn);NU1605;CS1591</NoWarn>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>