diff --git a/cloudkitclient-core/build.gradle.kts b/cloudkitclient-core/build.gradle.kts
index f2e3390..4eed051 100644
--- a/cloudkitclient-core/build.gradle.kts
+++ b/cloudkitclient-core/build.gradle.kts
@@ -16,7 +16,7 @@ kotlin {
         commonMain {
             dependencies {
                 api("io.ktor:ktor-client-core:$ktorVersion")
-                api("org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.3")
+                api("org.jetbrains.kotlinx:kotlinx-serialization-json:1.4.0")
                 api("org.jetbrains.kotlinx:kotlinx-datetime:0.4.0")
             }
         }