diff --git a/build.sbt b/build.sbt
index 81f1522..236907a 100644
--- a/build.sbt
+++ b/build.sbt
@@ -16,7 +16,7 @@ scalacOptions := Seq(
   "-indent",
   "-rewrite",
   "-source:future-migration",
-  "-Xtarget:17",
+  "-release:17",
   "-Wunused:all"
 )
 publishTo := Some(Resolver.file("file", new File(sys.props.getOrElse("publishTo", ""))))
diff --git a/src/main/scala/extensions.scala b/src/main/scala/extensions.scala
index 16f7b90..6ae4736 100644
--- a/src/main/scala/extensions.scala
+++ b/src/main/scala/extensions.scala
@@ -3,7 +3,6 @@ package ornicar.scalalib
 import alleycats.Zero
 import cats.Eq
 import cats.syntax.all.*
-import cats.data.Validated
 import scala.util.matching.Regex
 import pprint.pprintln
 
@@ -41,9 +40,6 @@ object extensions:
 
   extension [A](as: Iterable[A]) def mapBy[B](f: A => B): Map[B, A] = as.view.map { a => f(a) -> a }.toMap
 
-  extension [E, A](validated: Validated[E, A])
-    def flatMap[EE >: E, B](f: A => Validated[EE, B]): Validated[EE, B] = validated.andThen(f)
-
   extension [A](seq: Seq[A])
     def has(b: A)(using Eq[A]): Boolean = seq.contains(b)