diff --git a/build.cs b/build.cs
index e8fff19..1797031 100644
--- a/build.cs
+++ b/build.cs
@@ -27,7 +27,7 @@
         MSBuildSettings: new DotNetMSBuildSettings()
                             .SetVersion(version.FullSemVer)
                             .SetConfiguration(configuration)
-                            .WithProperty("WarnAsError", "true"));
+                            .WithProperty("TreatWarningsAsErrors", "true"));
 });
 
 Task("Clean")
diff --git a/build/build.cs b/build/build.cs
index 2ccda4e..94acd50 100644
--- a/build/build.cs
+++ b/build/build.cs
@@ -26,7 +26,7 @@
         MSBuildSettings: new DotNetMSBuildSettings()
                             .SetVersion(version.FullSemVer)
                             .SetConfiguration(configuration)
-                            .WithProperty("WarnAsError", "true"));
+                            .WithProperty("TreatWarningsAsErrors", "true"));
 });
 
 Task("Clean")
diff --git a/multifile-build/build.cs b/multifile-build/build.cs
index 2de37fd..18632f5 100644
--- a/multifile-build/build.cs
+++ b/multifile-build/build.cs
@@ -29,7 +29,7 @@
         MSBuildSettings: new DotNetMSBuildSettings()
                             .SetVersion(version.FullSemVer)
                             .SetConfiguration(configuration)
-                            .WithProperty("WarnAsError", "true"));
+                            .WithProperty("TreatWarningsAsErrors", "true"));
 });
 
 Task("Clean")