diff --git a/README.md b/README.md
index 523e81be..d960acd3 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 <p align="center">
   <a href="https://github.com/seljabali/java-time-fun/actions?query=branch%3Amain"><img alt="Build Status" src="https://github.com/seljabali/java-time-fun/actions/workflows/main.yml/badge.svg"/></a> 
   <a href="https://repo1.maven.org/maven2/org/eljabali/sami/javatimefun/javatimefun/"><img alt="Maven Central" src="https://img.shields.io/maven-metadata/v?metadataUrl=https%3A%2F%2Frepo1.maven.org%2Fmaven2%2Forg%2Feljabali%2Fsami%2Fjavatimefun%2Fjavatimefun%2Fmaven-metadata.xml"/></a> 
-  <a href="https://kotlinlang.org"><img alt="Kotlin" src="https://img.shields.io/badge/Kotlin-1.9.20-orange.svg?style=flat&logo=kotlin"/></a>
+  <a href="https://kotlinlang.org"><img alt="Kotlin" src="https://img.shields.io/badge/Kotlin-2.1.10-orange.svg?style=flat&logo=kotlin"/></a>
   <a href="https://mailchi.mp/kotlinweekly/kotlin-weekly-396"><img alt="Kotlin Weekly" src="https://skydoves.github.io/badges/kotlin-weekly.svg"/></a>
 </p> <br>
 
diff --git a/build.gradle.kts b/build.gradle.kts
index 47f2c6e0..40a01c43 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,8 +1,8 @@
-val kotlinVersion by extra { "1.9.20" }
+val kotlinVersion by extra { "2.1.10" }
 val junitVersion by extra { "5.8.1" }
 
 plugins {
-    kotlin("jvm") version "1.9.20"
+    kotlin("jvm") version "2.1.10"
     id("org.jetbrains.dokka") version "1.9.10"
     id("io.github.gradle-nexus.publish-plugin") version "1.3.0"
     `java-library`