diff --git a/go.mod b/go.mod
index 3833260..3bfcb66 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/crossplane-contrib/function-kcl
 
 go 1.24.9
 
-toolchain go1.25.4
+toolchain go1.25.5
 
 require (
 	dario.cat/mergo v1.0.2