diff --git a/codeSnippets/gradle.properties b/codeSnippets/gradle.properties
index 6a533c913..f4b6ef476 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-rigel-310
 ktor_version = 3.0.2
 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..45a4a5106 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-form-session/build.gradle.kts b/codeSnippets/snippets/auth-form-session/build.gradle.kts
index 29ea20e0b..f97ac259b 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-jwt-hs256/build.gradle.kts b/codeSnippets/snippets/auth-jwt-hs256/build.gradle.kts
index 29897e813..ff102f2dc 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-jwt-rs256/build.gradle.kts b/codeSnippets/snippets/auth-jwt-rs256/build.gradle.kts
index b7686cbfe..7d98d7bb0 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/auth-oauth-google/build.gradle.kts b/codeSnippets/snippets/auth-oauth-google/build.gradle.kts
index 233e2fd08..e1cace9e7 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("2.1.0")
 }
 
 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..fb38fcd27 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-engine-js/build.gradle.kts b/codeSnippets/snippets/client-engine-js/build.gradle.kts
index 6bc9755b2..0933d6154 100644
--- a/codeSnippets/snippets/client-engine-js/build.gradle.kts
+++ b/codeSnippets/snippets/client-engine-js/build.gradle.kts
@@ -5,7 +5,7 @@ val kotlinx_html_version: String by project
 
 plugins {
     kotlin("multiplatform")
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.1.0")
 }
 
 repositories {
diff --git a/codeSnippets/snippets/client-json-kotlinx/build.gradle.kts b/codeSnippets/snippets/client-json-kotlinx/build.gradle.kts
index be576dd21..99410c4a9 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-testing-mock/build.gradle.kts b/codeSnippets/snippets/client-testing-mock/build.gradle.kts
index 2d48eb17a..18f75d93b 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("2.1.0")
 }
 
 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..a3178c543 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("2.1.0")
 }
 
 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..9ac813882 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/client-websockets-serialization/build.gradle.kts b/codeSnippets/snippets/client-websockets-serialization/build.gradle.kts
index 5cc1015cc..dd78c9da8 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/cors/build.gradle.kts b/codeSnippets/snippets/cors/build.gradle.kts
index 23f94bf96..509ddbd26 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("2.1.0")
 }
 
 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..5c553f245 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/json-kotlinx-openapi/build.gradle.kts b/codeSnippets/snippets/json-kotlinx-openapi/build.gradle.kts
index 85b8368ab..c665994b8 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/json-kotlinx/build.gradle.kts b/codeSnippets/snippets/json-kotlinx/build.gradle.kts
index 5b0235109..120b47bb6 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("2.1.0")
 }
 
 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..58538c88c 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 "2.1.0"
 }
 
 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..5fa18f3eb 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 "2.1.0"
 }
 
 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..5fa18f3eb 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 "2.1.0"
 }
 
 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..5fa18f3eb 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 "2.1.0"
 }
 
 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..5fa18f3eb 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 "2.1.0"
 }
 
 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..882477874 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 "2.1.0"
+    kotlin("plugin.serialization").version("2.1.0")
 }
 
 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..1718af062 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 "2.1.0"
 }
 
 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..7b358c2e1 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("2.1.0")
 }
 
 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..5fa18f3eb 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 "2.1.0"
 }
 
 application {
diff --git a/codeSnippets/snippets/migrating-express-ktor/gradle.properties b/codeSnippets/snippets/migrating-express-ktor/gradle.properties
index 33a872074..1c5f03379 100644
--- a/codeSnippets/snippets/migrating-express-ktor/gradle.properties
+++ b/codeSnippets/snippets/migrating-express-ktor/gradle.properties
@@ -1,4 +1,4 @@
 ktor_version=3.0.2
-kotlin_version=2.0.0
+kotlin_version=2.1.20-rigel-310
 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..66aa80860 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/resource-routing/build.gradle.kts b/codeSnippets/snippets/resource-routing/build.gradle.kts
index 9e8d98bc7..e294293f6 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/server-websockets-serialization/build.gradle.kts b/codeSnippets/snippets/server-websockets-serialization/build.gradle.kts
index c377aba6e..77e7e490a 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/server-websockets-sharedflow/build.gradle.kts b/codeSnippets/snippets/server-websockets-sharedflow/build.gradle.kts
index e14f7baad..55de187a3 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 "3.0.2"
-    kotlin("plugin.serialization").version("2.0.0")
+    kotlin("plugin.serialization").version("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/session-cookie-client/build.gradle.kts b/codeSnippets/snippets/session-cookie-client/build.gradle.kts
index 2baa8bb00..7e3a9d028 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/session-cookie-server/build.gradle.kts b/codeSnippets/snippets/session-cookie-server/build.gradle.kts
index 2baa8bb00..7e3a9d028 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/session-header-server/build.gradle.kts b/codeSnippets/snippets/session-header-server/build.gradle.kts
index 2baa8bb00..7e3a9d028 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("2.1.0")
 }
 
 application {
diff --git a/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml b/codeSnippets/snippets/tutorial-client-kmm/gradle/libs.versions.toml
index 48630e618..34b49a144 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-rigel-310"
 coroutines = "1.9.0"
 ktor = "3.0.2"
 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..ed7f14c47 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-rigel-310"
 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/gradle/libs.versions.toml b/codeSnippets/snippets/tutorial-server-db-integration/gradle/libs.versions.toml
index 5dea5b952..cd3bfb951 100644
--- a/codeSnippets/snippets/tutorial-server-db-integration/gradle/libs.versions.toml
+++ b/codeSnippets/snippets/tutorial-server-db-integration/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 [versions]
 exposed-version = "0.56.0"
 h2-version = "2.3.232"
-kotlin-version = "2.0.21"
+kotlin-version = "2.1.20-rigel-310"
 ktor-version = "3.0.2"
 logback-version = "1.4.14"
 postgres-version = "42.7.4"
@@ -28,4 +28,4 @@ ktor-client-content-negotiation = { module = "io.ktor:ktor-client-content-negoti
 [plugins]
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin-version" }
 ktor = { id = "io.ktor.plugin", version.ref = "ktor-version" }
-kotlin-plugin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version = "2.0.21" }
+kotlin-plugin-serialization = { id = "org.jetbrains.kotlin.plugin.serialization", version = "2.1.0" }
diff --git a/codeSnippets/snippets/tutorial-server-docker-compose/build.gradle.kts b/codeSnippets/snippets/tutorial-server-docker-compose/build.gradle.kts
index b0611234a..009af35c0 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 "3.0.2"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.0"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0"
 }
 
 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 485526920..774948e1e 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 "3.0.2"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.0"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0"
 }
 
 application {
diff --git a/codeSnippets/snippets/tutorial-server-websockets/build.gradle.kts b/codeSnippets/snippets/tutorial-server-websockets/build.gradle.kts
index ce632464f..498b783dc 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 "3.0.2"
-    id("org.jetbrains.kotlin.plugin.serialization") version "2.0.0"
+    id("org.jetbrains.kotlin.plugin.serialization") version "2.1.0"
 }
 
 group = "com.example"