diff --git a/mill-build/build.mill b/mill-build/build.mill
index 9d18f94c..54627812 100644
--- a/mill-build/build.mill
+++ b/mill-build/build.mill
@@ -4,7 +4,7 @@ import mill._, scalalib._
 object `package` extends MillBuildRootModule {
   override def scalacOptions = super.scalacOptions() ++ Seq("-feature", "-deprecation", "-unchecked")
   override def ivyDeps = super.ivyDeps() ++ Seq(
-    ivy"dev.zio::zio:2.1.9",
+    ivy"dev.zio::zio:2.1.24",
     ivy"dev.zio::zio-config:4.0.2",
     ivy"dev.zio::zio-config-magnolia:4.0.2",
     ivy"dev.zio::zio-config-typesafe:4.0.2",
diff --git a/mill-build/src/millbuild/deps.scala b/mill-build/src/millbuild/deps.scala
index 610734f8..37955a7c 100644
--- a/mill-build/src/millbuild/deps.scala
+++ b/mill-build/src/millbuild/deps.scala
@@ -202,7 +202,7 @@ object Deps {
     }
 
     case object slf4j {
-      val `slf4j-api` = ivy"org.slf4j:slf4j-api:${Versions.slf4j}"
+      val `slf4j-api`    = ivy"org.slf4j:slf4j-api:${Versions.slf4j}"
       val `slf4j-simple` = ivy"org.slf4j:slf4j-simple:${Versions.slf4j}"
     }
 
@@ -267,7 +267,7 @@ object Versions {
   val spire                      = "0.18.0"
   val `tasty-query`              = "0.5.6"
   val upickle                    = "4.0.2"
-  val zio                        = "2.1.9"
+  val zio                        = "2.1.24"
   val `zio-cli`                  = "0.5.0"
   val `zio-config`               = "4.0.2"
   val `zio-interop-cats`         = "23.1.0.0"