diff --git a/build.sbt b/build.sbt
index ef02b74..af5a0d3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,8 +2,8 @@ lazy val root =
   project.in(file("."))
     .settings( name := "proust"
              , version := "0.1.0"
-             , scalaVersion := "3.7.4"
+             , scalaVersion := "3.8.1"
              , libraryDependencies += "com.github.sbt" % "junit-interface" % "0.13.3" % "test"
-             , scalacOptions := List("-encoding", "utf8", "-Xfatal-warnings", "-deprecation", "-unchecked"),
+             , scalacOptions := List("-encoding", "utf8", "-Werror", "-deprecation", "-unchecked"),
              Test / classLoaderLayeringStrategy := ClassLoaderLayeringStrategy.Flat
              )