diff --git a/README.md b/README.md
index faf7263..c002abf 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 [![License (3-Clause BSD)](https://img.shields.io/badge/license-BSD%203--Clause-blue.svg?style=flat-square)](https://opensource.org/licenses/BSD-3-Clause)
-[![Kotlin](https://img.shields.io/badge/kotlin-1.9.21-7f52ff)](https://kotlinlang.org/)
+[![Kotlin](https://img.shields.io/badge/kotlin-1.9.24-7f52ff)](https://kotlinlang.org/)
 [![bld](https://img.shields.io/badge/1.9.1-FA9052?label=bld&labelColor=2392FF)](https://rife2.com/bld)
 [![Release](https://img.shields.io/github/release/ethauvin/jokeapi.svg)](https://github.com/ethauvin/jokeapi/releases/latest)
 [![Maven Central](https://img.shields.io/maven-central/v/net.thauvin.erik/jokeapi?color=blue)](https://central.sonatype.com/artifact/net.thauvin.erik/jokeapi)
diff --git a/lib/bld/bld-wrapper.properties b/lib/bld/bld-wrapper.properties
index 315d0e7..3b10d0a 100644
--- a/lib/bld/bld-wrapper.properties
+++ b/lib/bld/bld-wrapper.properties
@@ -1,8 +1,8 @@
 bld.downloadExtensionJavadoc=false
 bld.downloadExtensionSources=true
 bld.extension-jacoco=com.uwyn.rife2:bld-jacoco-report:0.9.3
-bld.extensions=com.uwyn.rife2:bld-kotlin:0.9.1
 bld.extension-detekt=com.uwyn.rife2:bld-detekt:0.9.2
+bld.extensions=com.uwyn.rife2:bld-kotlin:0.9.4
 bld.repositories=MAVEN_LOCAL,MAVEN_CENTRAL,RIFE2_SNAPSHOTS,RIFE2_RELEASES
 bld.downloadLocation=
 bld.sourceDirectories=
diff --git a/pom.xml b/pom.xml
index f826f1e..41092ba 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
     <dependency>
       <groupId>org.jetbrains.kotlin</groupId>
       <artifactId>kotlin-stdlib</artifactId>
-      <version>1.9.22</version>
+      <version>1.9.24</version>
       <scope>compile</scope>
     </dependency>
     <dependency>
diff --git a/src/bld/java/net/thauvin/erik/JokeApiBuild.java b/src/bld/java/net/thauvin/erik/JokeApiBuild.java
index 1479469..d880b09 100644
--- a/src/bld/java/net/thauvin/erik/JokeApiBuild.java
+++ b/src/bld/java/net/thauvin/erik/JokeApiBuild.java
@@ -55,6 +55,7 @@ import static rife.bld.dependencies.Scope.compile;
 import static rife.bld.dependencies.Scope.test;
 
 public class JokeApiBuild extends Project {
+    final File srcMainKotlin = new File(srcMainDirectory(), "kotlin");
     public JokeApiBuild() {
         pkg = "net.thauvin.erik";
         name = "jokeapi";
@@ -65,13 +66,13 @@ public class JokeApiBuild extends Project {
         autoDownloadPurge = true;
         repositories = List.of(MAVEN_LOCAL, MAVEN_CENTRAL);
 
-        final var kotlin = version(1, 9, 22);
+        final var kotlin = version(1, 9, 24);
         scope(compile)
                 .include(dependency("org.jetbrains.kotlin", "kotlin-stdlib", kotlin))
                 .include(dependency("org.json", "json", "20240205"))
                 .include(dependency("net.thauvin.erik.urlencoder", "urlencoder-lib-jvm", version(1, 4, 0)));
         scope(test)
-                .include(dependency("org.jetbrains.kotlin", "kotlin-test-junit5", version(1, 9, 22)))
+                .include(dependency("org.jetbrains.kotlin", "kotlin-test-junit5", kotlin))
                 .include(dependency("org.junit.jupiter", "junit-jupiter", version(5, 10, 2)))
                 .include(dependency("org.junit.platform", "junit-platform-console-standalone", version(1, 10, 2)))
                 .include(dependency("com.willowtreeapps.assertk", "assertk-jvm", version(0, 28, 0)));
@@ -107,7 +108,7 @@ public class JokeApiBuild extends Project {
                 .signKey(property("sign.key"))
                 .signPassphrase(property("sign.passphrase"));
 
-        jarSourcesOperation().sourceDirectories(new File(srcMainDirectory(), "kotlin"));
+        jarSourcesOperation().sourceDirectories(srcMainKotlin);
     }
 
     public static void main(String[] args) {
@@ -142,6 +143,7 @@ public class JokeApiBuild extends Project {
     public void jacoco() throws IOException {
         new JacocoReportOperation()
                 .fromProject(this)
+                .sourceFiles(srcMainKotlin)
                 .execute();
     }