diff --git a/go.mod b/go.mod
index d65d70f..4771123 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/satorunooshie/e2e
 
-go 1.20
+go 1.21
 
 require github.com/google/go-cmp v0.5.9