diff --git a/.scalafmt.conf b/.scalafmt.conf
index f0f8336..0fa923e 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = 3.8.1
+version = 3.9.9
 
 // https://scalameta.org/scalafmt/docs/configuration.html#scala-dialects
 runner.dialect = scala213