diff --git a/.circleci/config.yml b/.circleci/config.yml
index b9453ad..9fbe99b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -52,7 +52,7 @@ jobs:
       - image: cimg/openjdk:21.0
     steps:
       - build_and_test:
-          kotlin: 2.0.20
+          kotlin: 2.0.0
 
 workflows:
   bld:
diff --git a/.github/workflows/bld.yml b/.github/workflows/bld.yml
index 3f7786d..55e101f 100644
--- a/.github/workflows/bld.yml
+++ b/.github/workflows/bld.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         java-version: [ 17, 21, 22 ]
-        kotlin-version: [ 1.19.24, 2.0.20 ]
+        kotlin-version: [ 1.19.24, 2.0.0 ]
 
     steps:
       - name: Checkout source repository
diff --git a/lib/bld/bld-wrapper.properties b/lib/bld/bld-wrapper.properties
index ee504f1..c42565e 100644
--- a/lib/bld/bld-wrapper.properties
+++ b/lib/bld/bld-wrapper.properties
@@ -4,9 +4,9 @@ bld.downloadLocation=
 bld.extensions=
 bld.javaOptions=
 bld.javacOptions=
-bld.extension-detekt=com.uwyn.rife2:bld-detekt:0.9.7
+bld.extension-detekt=com.uwyn.rife2:bld-detekt:0.9.6
 bld.extension-dokka=com.uwyn.rife2:bld-dokka:1.0.1
-bld.extension-kotlin=com.uwyn.rife2:bld-kotlin:1.0.2
+bld.extension-kotlin=com.uwyn.rife2:bld-kotlin:1.0.1
 bld.repositories=MAVEN_LOCAL,MAVEN_CENTRAL,RIFE2_RELEASES,RIFE2_SNAPSHOTS
 bld.sourceDirectories=
 bld.version=2.1.0