diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index ee8a930c..ac4ff7a7 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -14,7 +14,7 @@ env:
   JDK_JAVA_OPTIONS: -XX:+PrintCommandLineFlags -Xss10M # JDK_JAVA_OPTIONS is _the_ env. variable to use for modern Java
   JVM_OPTS: -XX:+PrintCommandLineFlags -Xss10M # for Java 8 only (sadly, it is not modern enough for JDK_JAVA_OPTIONS)
   scala_212_version: "2.12.20"
-  scala_213_version: "2.13.16"
+  scala_213_version: "2.13.17"
   scala_3_version: "3.3.6"
   SonatypeUrl: "https://finos.sonatype.app/platform/"
   SonatypeAppId: morphir-jvm
@@ -38,7 +38,7 @@ jobs:
       fail-fast: false
       matrix:
         java: ["11", "17"]
-        scala: ["2.12.20", "2.13.16", "3.3.6"]
+        scala: ["2.12.20", "2.13.17", "3.3.6"]
         node-version: ["20.x"]
     steps:
       - name: Checkout current branch
@@ -98,7 +98,7 @@ jobs:
       fail-fast: false
       matrix:
         java: ["17"] # Note there is no need ro actually run this for multiple JVM versions for JS
-        scala: ["2.12.20", "2.13.16", "3.3.6"]
+        scala: ["2.12.20", "2.13.17", "3.3.6"]
     steps:
       - name: Checkout current branch
         uses: actions/checkout@v4
@@ -135,7 +135,7 @@ jobs:
       fail-fast: false
       matrix:
         java: ["11"] # Note there is no need ro actually run this for multiple JVM versions for native
-        scala: ["2.12.20", "2.13.16", "3.3.6"]
+        scala: ["2.12.20", "2.13.17", "3.3.6"]
     steps:
       - name: Checkout current branch
         uses: actions/checkout@v4
diff --git a/mill-build/src/millbuild/deps.scala b/mill-build/src/millbuild/deps.scala
index 610734f8..78e6b1ee 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}"
     }
 
@@ -283,7 +283,7 @@ object ScalaVersions {
   import DevMode._
   val all      = if (devMode) Seq(scala3x) else Seq(scala213, scala3x)
   def scala212 = "2.12.20"
-  def scala213 = "2.13.16"
+  def scala213 = "2.13.17"
   def scala3x  = "3.3.6"
 
   def scalaJSVersion     = "1.17.0"
diff --git a/mill-build/src/millbuild/settings/ScalaSettings.scala b/mill-build/src/millbuild/settings/ScalaSettings.scala
index 1651d6f0..f57aa5ce 100644
--- a/mill-build/src/millbuild/settings/ScalaSettings.scala
+++ b/mill-build/src/millbuild/settings/ScalaSettings.scala
@@ -21,7 +21,7 @@ object ScalaSettings {
   implicit val rw: upickle.default.ReadWriter[ScalaSettings] = upickle.default.macroRW
 
   val defaultScala212Version = "2.12.20"
-  val defaultScala213Version = "2.13.16"
+  val defaultScala213Version = "2.13.17"
   val defaultScala3xVersion  = "3.3.6"
   val defaultCrossScalaVersions: List[String] =
     if (devMode) List(defaultScala3xVersion)