diff --git a/codeSnippets/gradle.properties b/codeSnippets/gradle.properties
index be7f3657b..9238ee41d 100644
--- a/codeSnippets/gradle.properties
+++ b/codeSnippets/gradle.properties
@@ -5,7 +5,7 @@ kotlin.native.binary.memoryModel = experimental
 # gradle configuration
 org.gradle.configureondemand = false
 # versions
-kotlin_version = 2.0.20
+kotlin_version = 2.1.20-polaris-189
 ktor_version = 3.0.0
 kotlinx_coroutines_version = 1.9.0
 kotlinx_serialization_version = 1.7.2
diff --git a/codeSnippets/snippets/auth-form-session-nested/build.gradle.kts b/codeSnippets/snippets/auth-form-session-nested/build.gradle.kts
index 7c2b294b3..fcba85597 100644
--- a/codeSnippets/snippets/auth-form-session-nested/build.gradle.kts
+++ b/codeSnippets/snippets/auth-form-session-nested/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-form-session/build.gradle.kts b/codeSnippets/snippets/auth-form-session/build.gradle.kts
index 29ea20e0b..0552fa675 100644
--- a/codeSnippets/snippets/auth-form-session/build.gradle.kts
+++ b/codeSnippets/snippets/auth-form-session/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-jwt-hs256/build.gradle.kts b/codeSnippets/snippets/auth-jwt-hs256/build.gradle.kts
index 29897e813..c569091b5 100644
--- a/codeSnippets/snippets/auth-jwt-hs256/build.gradle.kts
+++ b/codeSnippets/snippets/auth-jwt-hs256/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-jwt-rs256/build.gradle.kts b/codeSnippets/snippets/auth-jwt-rs256/build.gradle.kts
index b7686cbfe..64f3c9e3d 100644
--- a/codeSnippets/snippets/auth-jwt-rs256/build.gradle.kts
+++ b/codeSnippets/snippets/auth-jwt-rs256/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-oauth-google/build.gradle.kts b/codeSnippets/snippets/auth-oauth-google/build.gradle.kts
index 233e2fd08..5315a4899 100644
--- a/codeSnippets/snippets/auth-oauth-google/build.gradle.kts
+++ b/codeSnippets/snippets/auth-oauth-google/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-auth-oauth-google/build.gradle.kts b/codeSnippets/snippets/client-auth-oauth-google/build.gradle.kts
index 12c7dbdd1..09512a2c7 100644
--- a/codeSnippets/snippets/client-auth-oauth-google/build.gradle.kts
+++ b/codeSnippets/snippets/client-auth-oauth-google/build.gradle.kts
@@ -6,7 +6,7 @@ val hamcrest_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-engine-js/build.gradle.kts b/codeSnippets/snippets/client-engine-js/build.gradle.kts
index f5f2ef884..1435e45a3 100644
--- a/codeSnippets/snippets/client-engine-js/build.gradle.kts
+++ b/codeSnippets/snippets/client-engine-js/build.gradle.kts
@@ -3,7 +3,7 @@ val kotlinx_html_version: String by project
 
 plugins {
     kotlin("multiplatform")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 repositories {
diff --git a/codeSnippets/snippets/client-engine-winhttp/build.gradle.kts b/codeSnippets/snippets/client-engine-winhttp/build.gradle.kts
index 6a03153e8..aca5d3a8f 100644
--- a/codeSnippets/snippets/client-engine-winhttp/build.gradle.kts
+++ b/codeSnippets/snippets/client-engine-winhttp/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("multiplatform") version "2.0.0"
+    kotlin("multiplatform") version "2.0.21"
 }
 
 repositories {
diff --git a/codeSnippets/snippets/client-json-kotlinx/build.gradle.kts b/codeSnippets/snippets/client-json-kotlinx/build.gradle.kts
index be576dd21..b3ce37b75 100644
--- a/codeSnippets/snippets/client-json-kotlinx/build.gradle.kts
+++ b/codeSnippets/snippets/client-json-kotlinx/build.gradle.kts
@@ -6,7 +6,7 @@ val hamcrest_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-testing-mock/build.gradle.kts b/codeSnippets/snippets/client-testing-mock/build.gradle.kts
index 2d48eb17a..fa58bb151 100644
--- a/codeSnippets/snippets/client-testing-mock/build.gradle.kts
+++ b/codeSnippets/snippets/client-testing-mock/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-type-safe-requests/build.gradle.kts b/codeSnippets/snippets/client-type-safe-requests/build.gradle.kts
index 7c6c85ca4..83146384f 100644
--- a/codeSnippets/snippets/client-type-safe-requests/build.gradle.kts
+++ b/codeSnippets/snippets/client-type-safe-requests/build.gradle.kts
@@ -6,7 +6,7 @@ val hamcrest_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-validate-2xx-response/build.gradle.kts b/codeSnippets/snippets/client-validate-2xx-response/build.gradle.kts
index 994e9324f..2811ee2dc 100644
--- a/codeSnippets/snippets/client-validate-2xx-response/build.gradle.kts
+++ b/codeSnippets/snippets/client-validate-2xx-response/build.gradle.kts
@@ -6,7 +6,7 @@ val hamcrest_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-websockets-serialization/build.gradle.kts b/codeSnippets/snippets/client-websockets-serialization/build.gradle.kts
index 5cc1015cc..93d00c5db 100644
--- a/codeSnippets/snippets/client-websockets-serialization/build.gradle.kts
+++ b/codeSnippets/snippets/client-websockets-serialization/build.gradle.kts
@@ -6,7 +6,7 @@ val hamcrest_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/cors/build.gradle.kts b/codeSnippets/snippets/cors/build.gradle.kts
index 23f94bf96..86106da11 100644
--- a/codeSnippets/snippets/cors/build.gradle.kts
+++ b/codeSnippets/snippets/cors/build.gradle.kts
@@ -6,7 +6,7 @@ val junit_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/json-kotlinx-method-override/build.gradle.kts b/codeSnippets/snippets/json-kotlinx-method-override/build.gradle.kts
index dcd850a87..bb07a6384 100644
--- a/codeSnippets/snippets/json-kotlinx-method-override/build.gradle.kts
+++ b/codeSnippets/snippets/json-kotlinx-method-override/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/json-kotlinx-openapi/build.gradle.kts b/codeSnippets/snippets/json-kotlinx-openapi/build.gradle.kts
index 85b8368ab..f3255e539 100644
--- a/codeSnippets/snippets/json-kotlinx-openapi/build.gradle.kts
+++ b/codeSnippets/snippets/json-kotlinx-openapi/build.gradle.kts
@@ -6,7 +6,7 @@ val swagger_codegen_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/json-kotlinx/build.gradle.kts b/codeSnippets/snippets/json-kotlinx/build.gradle.kts
index 5b0235109..ecab7a377 100644
--- a/codeSnippets/snippets/json-kotlinx/build.gradle.kts
+++ b/codeSnippets/snippets/json-kotlinx/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/1_hello/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/1_hello/build.gradle.kts
index 2a08593dc..c735badf3 100644
--- a/codeSnippets/snippets/migrating-express-ktor/1_hello/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/1_hello/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
+    kotlin("jvm") version "2.0.21"
 }
 
 group = "com.example"
diff --git a/codeSnippets/snippets/migrating-express-ktor/1_hello_config/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/1_hello_config/build.gradle.kts
index 7b1422437..d7781d9c4 100644
--- a/codeSnippets/snippets/migrating-express-ktor/1_hello_config/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/1_hello_config/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
+    kotlin("jvm") version "2.0.21"
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/2_static/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/2_static/build.gradle.kts
index 7b1422437..d7781d9c4 100644
--- a/codeSnippets/snippets/migrating-express-ktor/2_static/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/2_static/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
+    kotlin("jvm") version "2.0.21"
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/3_router/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/3_router/build.gradle.kts
index 7b1422437..d7781d9c4 100644
--- a/codeSnippets/snippets/migrating-express-ktor/3_router/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/3_router/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
+    kotlin("jvm") version "2.0.21"
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/4_parameters/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/4_parameters/build.gradle.kts
index 7b1422437..d7781d9c4 100644
--- a/codeSnippets/snippets/migrating-express-ktor/4_parameters/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/4_parameters/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
+    kotlin("jvm") version "2.0.21"
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/5_send_response/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/5_send_response/build.gradle.kts
index 3c068ddf4..9f561a861 100644
--- a/codeSnippets/snippets/migrating-express-ktor/5_send_response/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/5_send_response/build.gradle.kts
@@ -4,8 +4,8 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("jvm") version "2.0.21"
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/6_templates/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/6_templates/build.gradle.kts
index 500568f5f..13e579689 100644
--- a/codeSnippets/snippets/migrating-express-ktor/6_templates/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/6_templates/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
+    kotlin("jvm") version "2.0.21"
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/7_receive_request/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/7_receive_request/build.gradle.kts
index 9889ca1ab..dca323d95 100644
--- a/codeSnippets/snippets/migrating-express-ktor/7_receive_request/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/7_receive_request/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/8_middleware/build.gradle.kts b/codeSnippets/snippets/migrating-express-ktor/8_middleware/build.gradle.kts
index 7b1422437..d7781d9c4 100644
--- a/codeSnippets/snippets/migrating-express-ktor/8_middleware/build.gradle.kts
+++ b/codeSnippets/snippets/migrating-express-ktor/8_middleware/build.gradle.kts
@@ -4,7 +4,7 @@ val logback_version: String by project
 
 plugins {
     application
-    kotlin("jvm") version "2.0.0"
+    kotlin("jvm") version "2.0.21"
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/gradle.properties b/codeSnippets/snippets/migrating-express-ktor/gradle.properties
index 8cac7c876..277fc0a90 100644
--- a/codeSnippets/snippets/migrating-express-ktor/gradle.properties
+++ b/codeSnippets/snippets/migrating-express-ktor/gradle.properties
@@ -1,4 +1,4 @@
 ktor_version=3.0.0
-kotlin_version=2.0.0
+kotlin_version=2.1.20-polaris-189
 logback_version=1.5.6
 kotlin.code.style=official
diff --git a/codeSnippets/snippets/request-validation/build.gradle.kts b/codeSnippets/snippets/request-validation/build.gradle.kts
index 5747e23bb..2ef77dc68 100644
--- a/codeSnippets/snippets/request-validation/build.gradle.kts
+++ b/codeSnippets/snippets/request-validation/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/resource-routing/build.gradle.kts b/codeSnippets/snippets/resource-routing/build.gradle.kts
index 9e8d98bc7..163207e84 100644
--- a/codeSnippets/snippets/resource-routing/build.gradle.kts
+++ b/codeSnippets/snippets/resource-routing/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/server-websockets-serialization/build.gradle.kts b/codeSnippets/snippets/server-websockets-serialization/build.gradle.kts
index c377aba6e..77462ce4a 100644
--- a/codeSnippets/snippets/server-websockets-serialization/build.gradle.kts
+++ b/codeSnippets/snippets/server-websockets-serialization/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/server-websockets-sharedflow/build.gradle.kts b/codeSnippets/snippets/server-websockets-sharedflow/build.gradle.kts
index 2ab7ddea5..de0adb14b 100644
--- a/codeSnippets/snippets/server-websockets-sharedflow/build.gradle.kts
+++ b/codeSnippets/snippets/server-websockets-sharedflow/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
     application
     kotlin("jvm")
     id("io.ktor.plugin") version "3.0.0"
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/session-cookie-client/build.gradle.kts b/codeSnippets/snippets/session-cookie-client/build.gradle.kts
index 2baa8bb00..b7d16cca3 100644
--- a/codeSnippets/snippets/session-cookie-client/build.gradle.kts
+++ b/codeSnippets/snippets/session-cookie-client/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/session-cookie-server/build.gradle.kts b/codeSnippets/snippets/session-cookie-server/build.gradle.kts
index 2baa8bb00..b7d16cca3 100644
--- a/codeSnippets/snippets/session-cookie-server/build.gradle.kts
+++ b/codeSnippets/snippets/session-cookie-server/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/session-header-server/build.gradle.kts b/codeSnippets/snippets/session-header-server/build.gradle.kts
index 2baa8bb00..b7d16cca3 100644
--- a/codeSnippets/snippets/session-header-server/build.gradle.kts
+++ b/codeSnippets/snippets/session-header-server/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     application
     kotlin("jvm")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.0.21")
 }
 
 application {
diff --git a/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml b/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml
index ea15b66cb..d553ce0b1 100644
--- a/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml
+++ b/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 agp = "8.3.1"
-kotlin = "2.0.0"
+kotlin = "2.1.20-polaris-189"
 coroutines = "1.9.0"
 ktor = "3.0.0"
 compose = "1.6.8"
diff --git a/codeSnippets/snippets/tutorial-full-stack-task-manager/gradle/libs.versions.toml b/codeSnippets/snippets/tutorial-full-stack-task-manager/gradle/libs.versions.toml
index 10666eb9e..fd1cfd7f8 100644
--- a/codeSnippets/snippets/tutorial-full-stack-task-manager/gradle/libs.versions.toml
+++ b/codeSnippets/snippets/tutorial-full-stack-task-manager/gradle/libs.versions.toml
@@ -13,7 +13,7 @@ androidx-material = "1.12.0"
 androidx-test-junit = "1.2.1"
 compose-plugin = "1.6.11"
 junit = "4.13.2"
-kotlin = "2.0.0"
+kotlin = "2.1.20-polaris-189"
 kotlinx-coroutines = "1.8.1"
 ktor = "2.3.12"
 logback = "1.5.6"
diff --git a/codeSnippets/snippets/tutorial-full-stack-task-manager/shared/build.gradle.kts b/codeSnippets/snippets/tutorial-full-stack-task-manager/shared/build.gradle.kts
index d595045db..433d1d2c5 100644
--- a/codeSnippets/snippets/tutorial-full-stack-task-manager/shared/build.gradle.kts
+++ b/codeSnippets/snippets/tutorial-full-stack-task-manager/shared/build.gradle.kts
@@ -5,7 +5,7 @@ plugins {
     //...
     alias(libs.plugins.kotlinMultiplatform)
     alias(libs.plugins.androidLibrary)
-    kotlin("plugin.serialization") version "1.9.20"
+    kotlin("plugin.serialization") version "1.9.25"
 }
 
 kotlin {
diff --git a/codeSnippets/snippets/tutorial-kotlin-rpc-app/build.gradle.kts b/codeSnippets/snippets/tutorial-kotlin-rpc-app/build.gradle.kts
index fd40d27ee..24cdbe254 100644
--- a/codeSnippets/snippets/tutorial-kotlin-rpc-app/build.gradle.kts
+++ b/codeSnippets/snippets/tutorial-kotlin-rpc-app/build.gradle.kts
@@ -1,6 +1,6 @@
 plugins {
-    kotlin("jvm") version "1.9.24"
-    kotlin("plugin.serialization") version "1.9.24"
+    kotlin("jvm") version "1.9.25"
+    kotlin("plugin.serialization") version "1.9.25"
     id("io.ktor.plugin") version "2.3.12"
     id("com.google.devtools.ksp") version "1.9.24-1.0.20"
     id("org.jetbrains.kotlinx.rpc.plugin") version "0.2.1"
diff --git a/codeSnippets/snippets/tutorial-server-db-integration/build.gradle.kts b/codeSnippets/snippets/tutorial-server-db-integration/build.gradle.kts
index d962bcd7a..683607caa 100644
--- a/codeSnippets/snippets/tutorial-server-db-integration/build.gradle.kts
+++ b/codeSnippets/snippets/tutorial-server-db-integration/build.gradle.kts
@@ -9,7 +9,7 @@ plugins {
     application
     kotlin("jvm")
     id("io.ktor.plugin") version "3.0.0"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.0"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.21"
 }
 
 group = "com.example"
diff --git a/codeSnippets/snippets/tutorial-server-docker-compose/build.gradle.kts b/codeSnippets/snippets/tutorial-server-docker-compose/build.gradle.kts
index 9c028ddec..e9ed1d81c 100644
--- a/codeSnippets/snippets/tutorial-server-docker-compose/build.gradle.kts
+++ b/codeSnippets/snippets/tutorial-server-docker-compose/build.gradle.kts
@@ -9,7 +9,7 @@ plugins {
     application
     kotlin("jvm")
     id("io.ktor.plugin") version "3.0.0"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.0"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.21"
 }
 
 group = "com.example"
diff --git a/codeSnippets/snippets/tutorial-server-get-started-maven/pom.xml b/codeSnippets/snippets/tutorial-server-get-started-maven/pom.xml
index 38ede64dd..c83de4b57 100644
--- a/codeSnippets/snippets/tutorial-server-get-started-maven/pom.xml
+++ b/codeSnippets/snippets/tutorial-server-get-started-maven/pom.xml
@@ -10,7 +10,7 @@
     <properties>
         <ktor_version>3.0.0-beta-1</ktor_version>
         <kotlin.code.style>official</kotlin.code.style>
-        <kotlin_version>1.9.22</kotlin_version>
+        <kotlin_version>1.9.25</kotlin_version>
         <logback_version>1.5.6</logback_version>
         <slf4j_version>2.0.12</slf4j_version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/codeSnippets/snippets/tutorial-server-restful-api/build.gradle.kts b/codeSnippets/snippets/tutorial-server-restful-api/build.gradle.kts
index bbe9c8389..a1cbc9a12 100644
--- a/codeSnippets/snippets/tutorial-server-restful-api/build.gradle.kts
+++ b/codeSnippets/snippets/tutorial-server-restful-api/build.gradle.kts
@@ -6,7 +6,7 @@ plugins {
     application
     kotlin("jvm")
     id("io.ktor.plugin") version "3.0.0"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.0"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.21"
 }
 
 application {
diff --git a/codeSnippets/snippets/tutorial-server-websockets/build.gradle.kts b/codeSnippets/snippets/tutorial-server-websockets/build.gradle.kts
index 78299ac46..26fb9f4c8 100644
--- a/codeSnippets/snippets/tutorial-server-websockets/build.gradle.kts
+++ b/codeSnippets/snippets/tutorial-server-websockets/build.gradle.kts
@@ -5,7 +5,7 @@ val logback_version: String by project
 plugins {
     kotlin("jvm")
     id("io.ktor.plugin") version "3.0.0"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.0"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.21"
 }
 
 group = "com.example"