diff --git a/clients/algoliasearch-client-kotlin/gradle/libs.versions.toml b/clients/algoliasearch-client-kotlin/gradle/libs.versions.toml
index c0e50b7002b..db44426f463 100644
--- a/clients/algoliasearch-client-kotlin/gradle/libs.versions.toml
+++ b/clients/algoliasearch-client-kotlin/gradle/libs.versions.toml
@@ -7,7 +7,7 @@ ktor = "3.2.0"
 kotlin-test-common = { module = "org.jetbrains.kotlin:kotlin-test-common" }
 kotlin-test-annotations-common = { module = "org.jetbrains.kotlin:kotlin-test-annotations-common" }
 kotlin-test-junit = { module = "org.jetbrains.kotlin:kotlin-test-junit" }
-kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version = "1.8.1" }
+kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version = "1.9.0" }
 kotlin-datetime = { module = "org.jetbrains.kotlinx:kotlinx-datetime", version = "0.7.0-0.6.x-compat" }
 
 # Ktor
diff --git a/tests/output/kotlin/gradle/libs.versions.toml b/tests/output/kotlin/gradle/libs.versions.toml
index 8284f4311b8..919af9ba34e 100644
--- a/tests/output/kotlin/gradle/libs.versions.toml
+++ b/tests/output/kotlin/gradle/libs.versions.toml
@@ -6,7 +6,7 @@ ktor = "3.2.0"
 
 [libraries]
 coroutines-test = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-test", version.ref = "coroutines" }
-kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version = "1.8.1" }
+kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version = "1.9.0" }
 ktor-client-okhttp = { group = "io.ktor", name = "ktor-client-okhttp", version.ref = "ktor" }
 ktor-client-darwin = { group = "io.ktor", name = "ktor-client-darwin", version.ref = "ktor" }