diff --git a/Cargo.toml b/Cargo.toml
index 6938415..bd96dfe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ derive_more = { version = "1.0", features = [
   "from",
 ] }
 # kxio = {path = "../kxio/"}
-kxio = "3.2"
+kxio = "4.0"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 tokio = { version = "1.41", features = ["full"] }