diff --git a/planner/gradle/libs.versions.toml b/planner/gradle/libs.versions.toml
index e7dc538a..2500e991 100644
--- a/planner/gradle/libs.versions.toml
+++ b/planner/gradle/libs.versions.toml
@@ -11,7 +11,7 @@ kotlin-ksp = "1.9.24-1.0.20"
 kotlinx-html = "0.7.3"
 # @see kotlin
 kotlinx-coroutines = "1.8.1"
-kotlinx-serialization = "1.6.3"
+kotlinx-serialization = "1.7.0"
 # TODO review TODELs with detekt mentioned in them.
 detekt = "1.23.6"