diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24d4bd96..7d60c742 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@ _See also: [the official libGDX changelog](https://github.com/libgdx/libgdx/blob
 
 #### 1.12.1-SNAPSHOT
 
+- **[UPDATE]** Updated to Kotlin 2.0.20.
+
 #### 1.12.1-rc2
 
 - **[UPDATE]** Updated to Kotlin 1.9.25.
diff --git a/README.md b/README.md
index 2cbe39ae..b6d8f6ea 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 [![GitHub Build](https://github.com/libktx/ktx/workflows/build/badge.svg)](https://github.com/libktx/ktx/actions?query=workflow%3Abuild)
-[![Kotlin](https://img.shields.io/badge/kotlin-1.9.25-orange.svg)](http://kotlinlang.org/)
+[![Kotlin](https://img.shields.io/badge/kotlin-2.0.20-orange.svg)](http://kotlinlang.org/)
 [![libGDX](https://img.shields.io/badge/libgdx-1.12.1-red.svg)](https://libgdx.com/)
 [![Maven Central](https://img.shields.io/maven-central/v/io.github.libktx/ktx-async.svg)](https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22io.github.libktx%22)
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 6cd9b41c..05033e12 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,7 @@
 import ktx.*
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
 import org.gradle.api.tasks.testing.logging.TestLogEvent.*
+import org.jetbrains.kotlin.gradle.dsl.jvm.JvmTargetValidationMode
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 buildscript {
@@ -80,6 +81,7 @@ subprojects {
       jvmTarget = JavaVersion.VERSION_1_8.toString()
       freeCompilerArgs += "-opt-in=kotlin.RequiresOptIn"
     }
+    jvmTargetValidationMode.set(JvmTargetValidationMode.IGNORE)
   }
   val compileTestKotlin: KotlinCompile by tasks
   compileTestKotlin.kotlinOptions.jvmTarget = JavaVersion.VERSION_11.toString()
diff --git a/collections/src/main/kotlin/ktx/collections/maps.kt b/collections/src/main/kotlin/ktx/collections/maps.kt
index ce790de1..7079b909 100644
--- a/collections/src/main/kotlin/ktx/collections/maps.kt
+++ b/collections/src/main/kotlin/ktx/collections/maps.kt
@@ -102,7 +102,7 @@ operator fun <Key, Value> GdxMap<Key, Value>.set(key: Key, value: Value): Value?
  */
 inline fun <Key, Value> GdxMap<Key, Value>.iterate(action: (Key, Value, MutableIterator<Entry<Key, Value>>) -> Unit) {
   val iterator = this.iterator()
-  while (iterator.hasNext) {
+  while (iterator.hasNext()) {
     val next = iterator.next()
     action(next.key, next.value, iterator)
   }
diff --git a/gradle.properties b/gradle.properties
index ffc34695..4cf05cc4 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 libGroup=io.github.libktx
 
-kotlinVersion=1.9.25
+kotlinVersion=2.0.20
 
 dokkaVersion=1.9.20
 junitPlatformVersion=1.2.0