diff --git a/airspec/build.sbt b/airspec/build.sbt
index 105fb49e0..5a59b6059 100644
--- a/airspec/build.sbt
+++ b/airspec/build.sbt
@@ -14,7 +14,7 @@ addCommandAlias(
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
 val SCALA_2_12          = "2.12.21"
-val SCALA_2_13          = "2.13.18"
+val SCALA_2_13          = "3.8.1"
 val SCALA_3             = "3.3.7"
 val targetScalaVersions = SCALA_3 :: SCALA_2_13 :: SCALA_2_12 :: Nil
 
diff --git a/build.sbt b/build.sbt
index f06bce3bf..a50398612 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ import scalajsbundler.JSDOMNodeJSEnv
 import xerial.sbt.pack.PackPlugin.{projectSettings, publishPackArchiveTgz}
 
 val SCALA_2_12          = "2.12.21"
-val SCALA_2_13          = "2.13.18"
+val SCALA_2_13          = "3.8.1"
 val SCALA_3             = sys.env.getOrElse("SCALA_VERSION", "3.3.7")
 val uptoScala2          = SCALA_2_13 :: SCALA_2_12 :: Nil
 val targetScalaVersions = SCALA_3 :: uptoScala2
diff --git a/examples/rx-demo/gallery/build.sbt b/examples/rx-demo/gallery/build.sbt
index c11bee136..b253f1e32 100644
--- a/examples/rx-demo/gallery/build.sbt
+++ b/examples/rx-demo/gallery/build.sbt
@@ -1,7 +1,7 @@
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
 val AIRFRAME_VERSION = "2025.1.27"
-ThisBuild / scalaVersion := "2.13.18"
+ThisBuild / scalaVersion := "3.8.1"
 
 lazy val gallery =
   project