diff --git a/buildSrc/build.gradle.kts b/buildSrc/build.gradle.kts
index 776d0b2a6..7cb90e214 100644
--- a/buildSrc/build.gradle.kts
+++ b/buildSrc/build.gradle.kts
@@ -17,7 +17,7 @@ dependencies {
     // Use their Maven coordinates (plus versions), not Gradle plugin IDs!
     // This should be the only place that Gradle plugin versions are defined, so they are aligned across all build scripts
     implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.8.21")
-    implementation("org.jetbrains.kotlin:kotlin-serialization:1.8.21")
+    implementation("org.jetbrains.kotlin:kotlin-serialization:1.9.21")
 }
 
 val gradleJvmTarget = 11