diff --git a/build.sbt b/build.sbt
index 407edaf6..5b14942a 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,4 +1,4 @@
-val scala3 = "3.1.0"
+val scala3 = "3.1.2"
 lazy val root = project
   .in(file("."))
   .settings(
@@ -16,17 +16,17 @@ lazy val root = project
     // Notice how the Scala 2.13-built libraries are used. For more information:
     // https://www.scala-lang.org/blog/2021/04/08/scala-3-in-sbt.html
     libraryDependencies ++= Seq(
-      "com.typesafe.akka"      %% "akka-actor-typed" % "2.6.14",
-      "com.typesafe.akka"      %% "akka-slf4j"       % "2.6.14",
+      "com.typesafe.akka"      %% "akka-actor-typed" % "2.6.19",
+      "com.typesafe.akka"      %% "akka-slf4j"       % "2.6.19",
     ).map(dep => dep.cross(CrossVersion.for3Use2_13)) ++ Seq(
       // Libraries that already fully support Scala 3:
-      "org.typelevel"          %% "cats-core"        % "2.6.1",
+      "org.typelevel"          %% "cats-core"        % "2.7.0",
       "org.scala-lang"         %% "scala3-staging"   % scalaVersion.value,
-      "org.scala-lang.modules" %% "scala-parser-combinators" % "2.0.0",
-      "ch.qos.logback"          % "logback-classic"  % "1.2.3",
+      "org.scala-lang.modules" %% "scala-parser-combinators" % "2.1.1",
+      "ch.qos.logback"          % "logback-classic"  % "1.2.11",
       "org.scalacheck"         %% "scalacheck"       % "1.15.4" % Test,
-      "org.scalameta"          %% "munit"            % "0.7.26" % Test,
-      "org.scalameta"          %% "munit-scalacheck" % "0.7.26" % Test,
+      "org.scalameta"          %% "munit"            % "0.7.29" % Test,
+      "org.scalameta"          %% "munit-scalacheck" % "0.7.29" % Test,
       "com.eed3si9n.expecty"   %% "expecty"          % "0.15.4" % Test,
     ),
 
diff --git a/src/main/java/progscala3/objectsystem/JavaArrays.java b/src/main/java/progscala3/objectsystem/JavaArrays.java
index ecff3db1..11f33121 100644
--- a/src/main/java/progscala3/objectsystem/JavaArrays.java
+++ b/src/main/java/progscala3/objectsystem/JavaArrays.java
@@ -3,6 +3,7 @@
 
 public class JavaArrays {
   public static void main(String[] args) {
+    System.out.println("*** A java.lang.ArrayStoreException will be thrown: ***");
     Integer[] array1 = new Integer[] {
       Integer.valueOf(1), Integer.valueOf(2), Integer.valueOf(3) };
     Number[] array2 = array1;          // Compiles fine, but shouldn't!!
diff --git a/src/main/scala/progscala3/appdesign/parthenon/PayrollCalculator.scala b/src/main/scala/progscala3/appdesign/parthenon/PayrollCalculator.scala
index d6a29c7b..9f62c4de 100644
--- a/src/main/scala/progscala3/appdesign/parthenon/PayrollCalculator.scala
+++ b/src/main/scala/progscala3/appdesign/parthenon/PayrollCalculator.scala
@@ -21,8 +21,8 @@ object PayrollCalculator:                                       // <1>
       (name, salary, ruleString) <- data
     yield Pay(name, salary, toDeductions(ruleString))
 
-  case class BadInput(message: String, input: String)
-    extends RuntimeException(s"Bad input data, $message: $input")
+  case class BadInput(message: String, input: String, array: Array[String])
+    extends RuntimeException(s"""Bad input data, $message: "$input" (array = ${array.mkString("[", ",", "]")}) """)
 
   private type Record = (String, Dollars, String)               // <4>
 
@@ -33,13 +33,13 @@ object PayrollCalculator:                                       // <1>
     yield toRule(line)
 
   private def toRule(line: String): Record =                    // <5>
-    line.split("""\s*,\s.*""") match
+    line.split("""\s*,\s*""") match
       case Array(name, salary, fedTax, stateTax, insurance, retirement) =>
         val ruleString = dsl.format(
           fedTax.toDouble, stateTax.toDouble,
           insurance.toDouble, retirement.toDouble)
         (name, Dollars(salary.toDouble), ruleString)
-      case array => throw BadInput("expected six fields", line)
+      case array => throw BadInput("expected six fields", line, array)
 
   private val parser = PayrollParser()                          // <6>
   private def toDeductions(rule: String): Deductions =
diff --git a/src/main/scala/progscala3/basicoop/Abstract.scala b/src/main/scala/progscala3/basicoop/Abstract.scala
index e715bf71..00514707 100644
--- a/src/main/scala/progscala3/basicoop/Abstract.scala
+++ b/src/main/scala/progscala3/basicoop/Abstract.scala
@@ -46,7 +46,7 @@ open class HelloService(override val name: String)                   // <3>
 
 // tag::main[]
 @main def HelloServiceMain(name: String, users: String*): Unit =
-  val hs = HelloService("hello")
+  val hs = HelloService(name)
   for
     user <- users
     request = Map("user" -> user)