diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8dabc3f..c781fdc 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -21,7 +21,7 @@ commands:
       - sdkman/setup-sdkman
       - sdkman/sdkman-install:
           candidate: kotlin
-          version: 2.0.20
+          version: 2.1.10
       - run:
           name: Download dependencies
           command: ./bld download
@@ -46,11 +46,11 @@ jobs:
     steps:
       - build_and_test
 
-  bld_jdk20:
+  bld_jdk21:
     <<: *defaults
 
     docker:
-      - image: cimg/openjdk:20.0
+      - image: cimg/openjdk:21.0
 
     steps:
       - build_and_test
@@ -59,4 +59,4 @@ workflows:
   bld:
     jobs:
       - bld_jdk17
-      - bld_jdk20
+      - bld_jdk21
diff --git a/.github/workflows/bld.yml b/.github/workflows/bld.yml
index a22b17e..92c82da 100644
--- a/.github/workflows/bld.yml
+++ b/.github/workflows/bld.yml
@@ -14,8 +14,8 @@ jobs:
 
     strategy:
       matrix:
-        java-version: [17, 21, 22]
-        kotlin-version: [1.19.24, 2.0.20]
+        java-version: [17, 21, 23]
+        kotlin-version: [1.9.25, 2.1.10]
 
     steps:
       - name: Checkout source repository
diff --git a/README.md b/README.md
index 56c9ee2..00001fc 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)
-[![bld](https://img.shields.io/badge/2.1.0-FA9052?label=bld&labelColor=2392FF)](https://rife2.com/bld)
+[![Kotlin](https://img.shields.io/badge/kotlin-2.1.10-7f52ff)](https://kotlinlang.org/)
 [![bld](https://img.shields.io/badge/2.2.1-FA9052?label=bld&labelColor=2392FF)](https://rife2.com/bld)
 [![Release](https://img.shields.io/github/release/ethauvin/bitly-shorten.svg)](https://github.com/ethauvin/bitly-shorten/releases/latest)
 [![Maven Central](https://img.shields.io/maven-central/v/net.thauvin.erik/bitly-shorten.svg?color=blue)](https://central.sonatype.com/artifact/net.thauvin.erik/bitly-shorten)
diff --git a/examples/bld/lib/bld/bld-wrapper.properties b/examples/bld/lib/bld/bld-wrapper.properties
index 3df526f..1ffe3ff 100644
--- a/examples/bld/lib/bld/bld-wrapper.properties
+++ b/examples/bld/lib/bld/bld-wrapper.properties
@@ -1,7 +1,7 @@
 bld.downloadExtensionJavadoc=false
 bld.downloadExtensionSources=true
 bld.downloadLocation=
-bld.extension-kotlin=com.uwyn.rife2:bld-kotlin:1.0.2
+bld.extension-kotlin=com.uwyn.rife2:bld-kotlin:1.0.4
 bld.repositories=MAVEN_LOCAL,MAVEN_CENTRAL,RIFE2_SNAPSHOTS,RIFE2_RELEASES
 bld.sourceDirectories=
 bld.version=2.2.1
diff --git a/examples/gradle/build.gradle.kts b/examples/gradle/build.gradle.kts
index a5aa5c3..e44fb22 100644
--- a/examples/gradle/build.gradle.kts
+++ b/examples/gradle/build.gradle.kts
@@ -1,7 +1,7 @@
 plugins {
     id("application")
     id("com.github.ben-manes.versions") version "0.51.0"
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.10"
 }
 
 repositories {
diff --git a/lib/bld/bld-wrapper.properties b/lib/bld/bld-wrapper.properties
index a1c4522..2c457ac 100644
--- a/lib/bld/bld-wrapper.properties
+++ b/lib/bld/bld-wrapper.properties
@@ -1,10 +1,8 @@
 bld.downloadExtensionJavadoc=false
 bld.downloadExtensionSources=true
 bld.downloadLocation=
-bld.extension-detekt=com.uwyn.rife2:bld-detekt:0.9.7
-bld.extension-dokka=com.uwyn.rife2:bld-dokka:1.0.1
-bld.extension-jacoco=com.uwyn.rife2:bld-jacoco-report:0.9.8
 bld.extension-kotlin=com.uwyn.rife2:bld-kotlin:1.0.2
+bld.extension-kotlin=com.uwyn.rife2:bld-kotlin:1.0.4
 bld.repositories=MAVEN_LOCAL,MAVEN_CENTRAL,RIFE2_SNAPSHOTS,RIFE2_RELEASES
 bld.sourceDirectories=
 bld.version=2.2.1