diff --git a/.github/workflows/bld.yml b/.github/workflows/bld.yml
index cf0302b..4e857aa 100644
--- a/.github/workflows/bld.yml
+++ b/.github/workflows/bld.yml
@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         java-version: [17, 21, 24]
-        kotlin-version: [1.9.25, 2.0.20, 2.1.20]
+        kotlin-version: [1.9.25, 2.0.20, 2.1.21]
 
     steps:
       - name: Checkout source repository
diff --git a/README.md b/README.md
index d43ba67..119c03e 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # mobibot
 
 [![License (3-Clause BSD)](https://img.shields.io/badge/license-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)
-[![Kotlin](https://img.shields.io/badge/kotlin-2.1.20-7f52ff.svg)](https://kotlinlang.org)
+[![Kotlin](https://img.shields.io/badge/kotlin-2.1.21-7f52ff.svg)](https://kotlinlang.org)
 [![bld](https://img.shields.io/badge/2.2.1-FA9052?label=bld&labelColor=2392FF)](https://rife2.com/bld)
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=ethauvin_mobibot&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=ethauvin_mobibot)
 [![GitHub CI](https://github.com/ethauvin/mobibot/actions/workflows/bld.yml/badge.svg)](https://github.com/ethauvin/mobibot/actions/workflows/bld.yml)
diff --git a/pom.xml b/pom.xml
index 7d916f4..b515fba 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>net.thauvin.erik.mobibot</groupId>
   <artifactId>mobibot</artifactId>
-  <version>0.8.0-rc+20250509073816</version>
+  <version>0.8.0-rc+20250515203523</version>
   <name>mobibot</name>
   <description></description>
   <url></url>
@@ -54,25 +54,25 @@
     <dependency>
       <groupId>org.jetbrains.kotlin</groupId>
       <artifactId>kotlin-stdlib</artifactId>
-      <version>2.1.20</version>
+      <version>2.1.21</version>
       <scope>compile</scope>
     </dependency>
     <dependency>
       <groupId>org.jetbrains.kotlin</groupId>
       <artifactId>kotlin-stdlib-common</artifactId>
-      <version>2.1.20</version>
+      <version>2.1.21</version>
       <scope>compile</scope>
     </dependency>
     <dependency>
       <groupId>org.jetbrains.kotlin</groupId>
       <artifactId>kotlin-stdlib-jdk7</artifactId>
-      <version>2.1.20</version>
+      <version>2.1.21</version>
       <scope>compile</scope>
     </dependency>
     <dependency>
       <groupId>org.jetbrains.kotlin</groupId>
       <artifactId>kotlin-stdlib-jdk8</artifactId>
-      <version>2.1.20</version>
+      <version>2.1.21</version>
       <scope>compile</scope>
     </dependency>
     <dependency>
diff --git a/src/bld/java/net/thauvin/erik/MobibotBuild.java b/src/bld/java/net/thauvin/erik/MobibotBuild.java
index dde5dc8..3792fa1 100644
--- a/src/bld/java/net/thauvin/erik/MobibotBuild.java
+++ b/src/bld/java/net/thauvin/erik/MobibotBuild.java
@@ -82,7 +82,7 @@ public class MobibotBuild extends Project {
                 SONATYPE_SNAPSHOTS_LEGACY);
 
         var log4j = version(2, 24, 3);
-        var kotlin = version(2, 1, 20);
+        var kotlin = version(2, 1, 21);
         var langchain = version(0, 36, 2);
         scope(compile)
                 // PircBotX