diff --git a/build.sbt b/build.sbt
index 71ffd7e..0305cf9 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 name := "blog-code-samples"
 
-val scala2Version = "2.13.18"
+val scala2Version = "3.9.0"
 val scala3Version = "3.7.4"
 
 lazy val cats = project