diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 77e9e2f..ce4033d 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.0.21"  # Note: Plugin versions must be updated in the settings.gradle.kts too
+kotlin = "2.0.20"  # Note: Plugin versions must be updated in the settings.gradle.kts too
 
 groovy = "3.0.22"
 jansi = "2.4.1"
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 2cd8e1f..3e1187a 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,8 +1,8 @@
 pluginManagement {
 	plugins {
 		// Update this in libs.version.toml when you change it here.
-		kotlin("jvm") version "2.0.21"
-		kotlin("plugin.serialization") version "2.0.21"
+		kotlin("jvm") version "2.0.20"
+		kotlin("plugin.serialization") version "2.0.20"
 
 		id("com.github.jakemarsden.git-hooks") version "0.0.2"
 		id("com.github.johnrengelman.shadow") version "8.1.1"