diff --git a/modules/core/src/main/scala/org/scalasteward/core/buildtool/sbt/SbtAlg.scala b/modules/core/src/main/scala/org/scalasteward/core/buildtool/sbt/SbtAlg.scala
index 29240fe679..c7e5ddce04 100644
--- a/modules/core/src/main/scala/org/scalasteward/core/buildtool/sbt/SbtAlg.scala
+++ b/modules/core/src/main/scala/org/scalasteward/core/buildtool/sbt/SbtAlg.scala
@@ -110,7 +110,7 @@ final class SbtAlg[F[_]](config: Config)(implicit
       projectDir = buildRootDir / "project"
       files0 <- (
         fileAlg.walk(buildRootDir, 1).filter(_.extension.contains(".sbt")) ++
-          fileAlg.walk(projectDir, 1).filter(_.extension.exists(Set(".sbt", ".scala")))
+          fileAlg.walk(projectDir, 3).filter(_.extension.exists(Set(".sbt", ".scala")))
       ).compile.toList
       _ <- Nel.fromList(files0).fold(F.unit) { files1 =>
         scalafixCli.runMigration(buildRootDir, files1, migration)