diff --git a/go.mod b/go.mod
index 91ab42b..68f8829 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,6 @@ module github.com/d-kuro/geminiwebtools
 
 go 1.24.0
 
-toolchain go1.24.5
+toolchain go1.27.4
 
 require golang.org/x/oauth2 v0.30.0