diff --git a/howto-dapp/build.gradle b/howto-dapp/build.gradle
index 6ad834da..8f2e467f 100644
--- a/howto-dapp/build.gradle
+++ b/howto-dapp/build.gradle
@@ -1,7 +1,7 @@
 plugins {
     id 'java'
-    id 'com.github.johnrengelman.shadow' version '6.1.0'
-    id 'org.jetbrains.kotlin.jvm' version '1.8.21'
+    id 'com.github.johnrengelman.shadow' version '8.1.1'
+    id 'org.jetbrains.kotlin.jvm' version '1.9.0'
 }
 
 group 'de.timolia.howto'