diff --git a/common/build.gradle.kts b/common/build.gradle.kts
index 7c2364e..d224a6d 100644
--- a/common/build.gradle.kts
+++ b/common/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     id("java-library")
-    kotlin("jvm") version "1.9.24"
+    kotlin("jvm") version "2.0.0"
     id("org.jetbrains.dokka")
     id("maven-publish")
     id("signing")
diff --git a/packet/build.gradle.kts b/packet/build.gradle.kts
index 3becff2..f02375c 100644
--- a/packet/build.gradle.kts
+++ b/packet/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     id("java-library")
-    kotlin("jvm") version "1.9.24"
+    kotlin("jvm") version "2.0.0"
     id("org.jetbrains.dokka")
     id("maven-publish")
     id("signing")
diff --git a/sample/build.gradle.kts b/sample/build.gradle.kts
index 3170175..c28780b 100644
--- a/sample/build.gradle.kts
+++ b/sample/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     id("java-library")
-    kotlin("jvm") version "1.9.24"
+    kotlin("jvm") version "2.0.0"
 }
 
 group = "dev.keiji.openpgp"
diff --git a/settings.gradle.kts b/settings.gradle.kts
index b90e233..213fa0a 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,6 +1,6 @@
 pluginManagement {
     plugins {
-        kotlin("jvm") version "1.9.24"
+        kotlin("jvm") version "2.0.0"
         id("org.jetbrains.dokka") version "1.9.20"
         id("io.gitlab.arturbosch.detekt") version "1.23.6"
     }
diff --git a/signature-ext/build.gradle.kts b/signature-ext/build.gradle.kts
index 81cf24c..28ef873 100644
--- a/signature-ext/build.gradle.kts
+++ b/signature-ext/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     id("java-library")
-    kotlin("jvm") version "1.9.24"
+    kotlin("jvm") version "2.0.0"
     id("org.jetbrains.dokka")
     id("maven-publish")
     id("signing")