diff --git a/build.sbt b/build.sbt
index eef27b8..2b398b3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -4,7 +4,7 @@ import ModuleMdocPlugin.autoImport.mdocScalacOptions
 lazy val prjName                = "erules"
 lazy val org                    = "com.github.geirolz"
 lazy val scala213               = "2.13.8"
-lazy val scala31                = "3.1.3"
+lazy val scala31                = "3.2.1"
 lazy val supportedScalaVersions = List(scala213, scala31)
 
 //## global project to no publish ##