diff --git a/build.gradle b/build.gradle
index 76fbb4e..2843477 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,8 +13,8 @@ plugins {
     id 'checkstyle'
     id 'maven-publish'
     id 'com.github.spotbugs' version '5.0.14'
-    id 'org.jetbrains.kotlin.jvm' version '1.7.20'
-    id 'org.jetbrains.kotlin.plugin.spring' version '1.7.20'
+    id 'org.jetbrains.kotlin.jvm' version '1.8.20'
+    id 'org.jetbrains.kotlin.plugin.spring' version '1.8.20'
 }
 
 description = "Rhizome client libraries"