diff --git a/build.sc b/build.sc
index eca8f9e..bb5b1f7 100644
--- a/build.sc
+++ b/build.sc
@@ -12,7 +12,7 @@ def millBinaryVersion(millVersion: String) = scalaNativeBinaryVersion(millVersio
 
 object `mill-tpolecat` extends Cross[MillTpolecatCross](millVersions: _*)
 class MillTpolecatCross(millVersion: String) extends CrossModuleBase with PublishModule {
-  override def crossScalaVersion = "2.13.13"
+  override def crossScalaVersion = "2.13.15"
   override def artifactSuffix    = s"_mill${millBinaryVersion(millVersion)}" + super.artifactSuffix()
 
   def compileIvyDeps = Agg(ivy"com.lihaoyi::mill-scalalib:$millVersion")