diff --git a/go.mod b/go.mod
index 9ad192c..47bbf93 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/ymw0407/jamo
 
-go 1.21.6
+go 1.20
 
 require github.com/stretchr/testify v1.9.0