diff --git a/chat/build.gradle b/chat/build.gradle
index 4bceea5e..93d2143a 100644
--- a/chat/build.gradle
+++ b/chat/build.gradle
@@ -3,8 +3,8 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.0.20"
-        classpath "org.jetbrains.kotlin:kotlin-serialization:2.0.20"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.1.0"
+        classpath "org.jetbrains.kotlin:kotlin-serialization:2.1.0"
     }
 }
 
@@ -37,7 +37,7 @@ kotlin {
     sourceSets {
         backendMain {
             dependencies {
-                implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:2.0.20"
+                implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:2.1.0"
                 implementation "io.ktor:ktor-server-netty"
                 implementation "io.ktor:ktor-server-websockets"
                 implementation "io.ktor:ktor-server-call-logging"
diff --git a/client-mpp/build.gradle b/client-mpp/build.gradle
index 1e99a9d3..db8fa3e0 100644
--- a/client-mpp/build.gradle
+++ b/client-mpp/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         gradlePluginPortal()
     }
     dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:2.0.20")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:2.1.0")
         classpath("com.android.tools.build:gradle:7.0.4")
     }
 }
diff --git a/client-multipart/build.gradle b/client-multipart/build.gradle
index 0ae48b4d..9d8196a2 100644
--- a/client-multipart/build.gradle
+++ b/client-multipart/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         gradlePluginPortal()
     }
     dependencies {
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.0.20"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.1.0"
         classpath "io.ktor.plugin:plugin:3.0.3"
     }
 }
@@ -27,7 +27,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:2.0.20'
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:2.1.0'
     implementation "io.ktor:ktor-server-html-builder"
     implementation 'ch.qos.logback:logback-classic:1.5.12'
     implementation 'io.ktor:ktor-server-netty-jvm'
diff --git a/client-tools/build.gradle b/client-tools/build.gradle
index b6f52c9b..39178378 100644
--- a/client-tools/build.gradle
+++ b/client-tools/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         gradlePluginPortal()
     }
     dependencies {
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.0.20"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.1.0"
         classpath "io.ktor.plugin:plugin:3.0.3"
     }
 }
@@ -27,7 +27,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:2.0.20'
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:2.1.0'
     implementation "io.ktor:ktor-server-html-builder"
     implementation 'ch.qos.logback:logback-classic:1.5.12'
     implementation 'io.ktor:ktor-server-netty-jvm'
diff --git a/di-kodein/build.gradle.kts b/di-kodein/build.gradle.kts
index beaefc0c..0d8250bb 100644
--- a/di-kodein/build.gradle.kts
+++ b/di-kodein/build.gradle.kts
@@ -2,9 +2,9 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
-    kotlin("plugin.serialization") version "2.0.20"
+    kotlin("plugin.serialization") version "2.1.0"
 }
 
 application {
diff --git a/di-kodein/gradle.properties b/di-kodein/gradle.properties
index e018114d..4b4af726 100644
--- a/di-kodein/gradle.properties
+++ b/di-kodein/gradle.properties
@@ -1,3 +1,3 @@
-kotlin_version=2.0.20
+kotlin_version=2.1.0
 logback_version=1.3.14
 kotlin.code.style=official
diff --git a/filelisting/build.gradle.kts b/filelisting/build.gradle.kts
index 13c8c4d6..770b3bc3 100644
--- a/filelisting/build.gradle.kts
+++ b/filelisting/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/filelisting/gradle.properties b/filelisting/gradle.properties
index e018114d..4b4af726 100644
--- a/filelisting/gradle.properties
+++ b/filelisting/gradle.properties
@@ -1,3 +1,3 @@
-kotlin_version=2.0.20
+kotlin_version=2.1.0
 logback_version=1.3.14
 kotlin.code.style=official
diff --git a/graalvm/build.gradle.kts b/graalvm/build.gradle.kts
index fb9dad8a..2b28ae39 100644
--- a/graalvm/build.gradle.kts
+++ b/graalvm/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
     application
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
     id("org.graalvm.buildtools.native") version "0.9.19"
 }
diff --git a/h2/build.gradle.kts b/h2/build.gradle.kts
index 7141c5dd..52f0b024 100644
--- a/h2/build.gradle.kts
+++ b/h2/build.gradle.kts
@@ -3,7 +3,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/h2/gradle.properties b/h2/gradle.properties
index e018114d..4b4af726 100644
--- a/h2/gradle.properties
+++ b/h2/gradle.properties
@@ -1,3 +1,3 @@
-kotlin_version=2.0.20
+kotlin_version=2.1.0
 logback_version=1.3.14
 kotlin.code.style=official
diff --git a/httpbin/build.gradle.kts b/httpbin/build.gradle.kts
index eaa61d8d..efe035d6 100644
--- a/httpbin/build.gradle.kts
+++ b/httpbin/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/httpbin/gradle.properties b/httpbin/gradle.properties
index a725dae7..16a6aa4f 100644
--- a/httpbin/gradle.properties
+++ b/httpbin/gradle.properties
@@ -1,4 +1,4 @@
-kotlin_version=2.0.20
+kotlin_version=2.1.0
 logback_version=1.3.14
 kotlin.code.style=official
 
diff --git a/jwt-auth-tests/build.gradle.kts b/jwt-auth-tests/build.gradle.kts
index ce9da638..8479919a 100644
--- a/jwt-auth-tests/build.gradle.kts
+++ b/jwt-auth-tests/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
-    kotlin("jvm") version "2.0.20"
-    kotlin("plugin.serialization") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
+    kotlin("plugin.serialization") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/ktor-client-wasm/gradle/libs.versions.toml b/ktor-client-wasm/gradle/libs.versions.toml
index 126b6f1c..66103a9a 100644
--- a/ktor-client-wasm/gradle/libs.versions.toml
+++ b/ktor-client-wasm/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 compose = "1.6.2"
 compose-plugin = "1.6.0"
 junit = "4.13.2"
-kotlin = "2.0.20"
+kotlin = "2.1.0"
 ktor = "3.0.3"
 
 [libraries]
diff --git a/kweet/build.gradle.kts b/kweet/build.gradle.kts
index e4da1b0a..332e2042 100644
--- a/kweet/build.gradle.kts
+++ b/kweet/build.gradle.kts
@@ -3,9 +3,9 @@ val logback_version: String by project
 val exposed_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
-    kotlin("plugin.serialization") version "2.0.20"
+    kotlin("plugin.serialization") version "2.1.0"
 }
 
 application {
diff --git a/location-header/build.gradle.kts b/location-header/build.gradle.kts
index 85fb6be5..f7923627 100644
--- a/location-header/build.gradle.kts
+++ b/location-header/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/maven-google-appengine-standard/pom.xml b/maven-google-appengine-standard/pom.xml
index c6cc41f7..5f49bf7a 100644
--- a/maven-google-appengine-standard/pom.xml
+++ b/maven-google-appengine-standard/pom.xml
@@ -11,7 +11,7 @@
     <artifactId>maven-google-appengine-standard</artifactId>
 
     <properties>
-        <kotlin.version>2.0.20</kotlin.version>
+        <kotlin.version>2.1.0</kotlin.version>
         <slf4j.version>1.7.36</slf4j.version>
         <appengine.version>2.0.31</appengine.version>
         <servlet.version>4.0.1</servlet.version>
diff --git a/mongodb/build.gradle.kts b/mongodb/build.gradle.kts
index a3f599f9..c53cd143 100644
--- a/mongodb/build.gradle.kts
+++ b/mongodb/build.gradle.kts
@@ -3,9 +3,9 @@ val logback_version: String by project
 val mongodb_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.20"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0"
 }
 
 group = "com.example"
diff --git a/mongodb/gradle.properties b/mongodb/gradle.properties
index 92fcb6fa..60dff4e2 100644
--- a/mongodb/gradle.properties
+++ b/mongodb/gradle.properties
@@ -1,4 +1,4 @@
-kotlin_version=2.0.20
+kotlin_version=2.1.0
 logback_version=1.3.14
 mongodb_version=4.8.0
 kotlin.code.style=official
diff --git a/mvc-web/build.gradle.kts b/mvc-web/build.gradle.kts
index 8367077d..3d8239ab 100644
--- a/mvc-web/build.gradle.kts
+++ b/mvc-web/build.gradle.kts
@@ -4,9 +4,9 @@ val h2_version: String by project
 val exposed_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "2.3.6"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.20"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0"
 }
 
 group = "com.example"
diff --git a/mvc-web/gradle.properties b/mvc-web/gradle.properties
index 78d7aac2..bac16770 100644
--- a/mvc-web/gradle.properties
+++ b/mvc-web/gradle.properties
@@ -1,4 +1,4 @@
-kotlin_version=2.0.20
+kotlin_version=2.1.0
 logback_version=1.4.11
 exposed_version=0.41.1
 h2_version=2.1.214
diff --git a/native-image-server-with-yaml-config/build.gradle.kts b/native-image-server-with-yaml-config/build.gradle.kts
index 74ea5e4c..038b3214 100644
--- a/native-image-server-with-yaml-config/build.gradle.kts
+++ b/native-image-server-with-yaml-config/build.gradle.kts
@@ -3,9 +3,9 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.10"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.10"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0"
     id("org.graalvm.buildtools.native") version "0.10.2"
 }
 
diff --git a/native-image-server-with-yaml-config/gradle.properties b/native-image-server-with-yaml-config/gradle.properties
index 06c752af..b5d83850 100644
--- a/native-image-server-with-yaml-config/gradle.properties
+++ b/native-image-server-with-yaml-config/gradle.properties
@@ -1,4 +1,4 @@
 kotlin.code.style=official
 ktor_version=3.0.3
-kotlin_version=2.0.10
+kotlin_version=2.1.0
 logback_version=1.4.14
diff --git a/opentelemetry/client/build.gradle.kts b/opentelemetry/client/build.gradle.kts
index 420cc959..9fdc2a43 100644
--- a/opentelemetry/client/build.gradle.kts
+++ b/opentelemetry/client/build.gradle.kts
@@ -4,7 +4,7 @@ val kotlin_version: String by project
 val opentelemetry_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
     id("application")
 }
diff --git a/opentelemetry/server/build.gradle.kts b/opentelemetry/server/build.gradle.kts
index 0710ef93..db77607d 100644
--- a/opentelemetry/server/build.gradle.kts
+++ b/opentelemetry/server/build.gradle.kts
@@ -4,7 +4,7 @@ val opentelemetry_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
     id("application")
 }
diff --git a/opentelemetry/shared/build.gradle.kts b/opentelemetry/shared/build.gradle.kts
index 3223c1b0..b905f047 100644
--- a/opentelemetry/shared/build.gradle.kts
+++ b/opentelemetry/shared/build.gradle.kts
@@ -4,7 +4,7 @@ val opentelemetry_exporter_otlp_version: String by project
 val opentelemetry_sdk_extension_autoconfigure_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/postgres/build.gradle.kts b/postgres/build.gradle.kts
index b6f65753..91e58fa8 100644
--- a/postgres/build.gradle.kts
+++ b/postgres/build.gradle.kts
@@ -2,9 +2,9 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.20"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0"
 }
 
 group = "com.example"
diff --git a/postgres/gradle.properties b/postgres/gradle.properties
index e018114d..4b4af726 100644
--- a/postgres/gradle.properties
+++ b/postgres/gradle.properties
@@ -1,3 +1,3 @@
-kotlin_version=2.0.20
+kotlin_version=2.1.0
 logback_version=1.3.14
 kotlin.code.style=official
diff --git a/redirect-with-exception/build.gradle.kts b/redirect-with-exception/build.gradle.kts
index b3a88b69..982acc5e 100644
--- a/redirect-with-exception/build.gradle.kts
+++ b/redirect-with-exception/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/reverse-proxy-ws/build.gradle.kts b/reverse-proxy-ws/build.gradle.kts
index a73cedc4..6656e89d 100644
--- a/reverse-proxy-ws/build.gradle.kts
+++ b/reverse-proxy-ws/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/reverse-proxy/build.gradle.kts b/reverse-proxy/build.gradle.kts
index 619f8a39..45a4610c 100644
--- a/reverse-proxy/build.gradle.kts
+++ b/reverse-proxy/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/rx/build.gradle.kts b/rx/build.gradle.kts
index 4c125030..a1801f6e 100644
--- a/rx/build.gradle.kts
+++ b/rx/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/sse/build.gradle.kts b/sse/build.gradle.kts
index 9b689a98..dfa5e357 100644
--- a/sse/build.gradle.kts
+++ b/sse/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/structured-logging/build.gradle.kts b/structured-logging/build.gradle.kts
index 7ceda364..e2ef507c 100644
--- a/structured-logging/build.gradle.kts
+++ b/structured-logging/build.gradle.kts
@@ -2,7 +2,7 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
 }
 
diff --git a/version-diff/build.gradle.kts b/version-diff/build.gradle.kts
index d8f03cfe..92e7ee79 100644
--- a/version-diff/build.gradle.kts
+++ b/version-diff/build.gradle.kts
@@ -2,9 +2,9 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
-    kotlin("plugin.serialization") version "2.0.20"
+    kotlin("plugin.serialization") version "2.1.0"
 }
 
 group = "org.example"
diff --git a/youkube/build.gradle.kts b/youkube/build.gradle.kts
index d6b7c1dd..a6065ea6 100644
--- a/youkube/build.gradle.kts
+++ b/youkube/build.gradle.kts
@@ -2,9 +2,9 @@ val kotlin_version: String by project
 val logback_version: String by project
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.1.0"
     id("io.ktor.plugin") version "3.0.3"
-    kotlin("plugin.serialization") version "2.0.20"
+    kotlin("plugin.serialization") version "2.1.0"
 }
 
 application {