diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 3791eacc..7cd18d97 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,7 +1,7 @@
 [versions]
 kotlin = "2.2.0"
 coroutines = "1.10.2"
-serialization = "1.8.1"
+serialization = "1.9.0"
 okhttp = "5.0.0-alpha.16" # Major version is locked by Tachiyomi extensions
 javalin = "6.7.0"
 jackson = "2.18.3" # jackson version locked by javalin, ref: `io.javalin.core.util.OptionalDependency`