diff --git a/Cargo.toml b/Cargo.toml
index 25cf281..fae054b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ ignore = "0.4"
 file-format = { version = "0.26", features = ["reader-txt"] }
 
 
-kxio =  "3.1"
+kxio =  "4.0"
 
 regex = "1.10"
 serde = { version = "1.0", features = ["derive"] }