diff --git a/README.md b/README.md
index 9e41b8e..e43162f 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-2.0.0-7f52ff)](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/akismet-kotlin.svg)](https://github.com/ethauvin/akismet-kotlin/releases/latest)
 [![Nexus Snapshot](https://img.shields.io/nexus/s/net.thauvin.erik/akismet-kotlin?label=snapshot&server=https%3A%2F%2Foss.sonatype.org%2F)](https://oss.sonatype.org/content/repositories/snapshots/net/thauvin/erik/akismet-kotlin/)
diff --git a/src/bld/java/net/thauvin/erik/AkismetBuild.java b/src/bld/java/net/thauvin/erik/AkismetBuild.java
index 2f7d983..b2db28b 100644
--- a/src/bld/java/net/thauvin/erik/AkismetBuild.java
+++ b/src/bld/java/net/thauvin/erik/AkismetBuild.java
@@ -67,7 +67,7 @@ public class AkismetBuild extends Project {
         repositories = List.of(MAVEN_LOCAL, MAVEN_CENTRAL);
 
         var okHttp = version(4, 12, 0);
-        final var kotlin = version(2, 0, 0);
+        final var kotlin = version(1, 9, 24);
         scope(compile)
                 .include(dependency("org.jetbrains.kotlin", "kotlin-stdlib", kotlin))
                 .include(dependency("com.squareup.okhttp3", "okhttp", okHttp))