diff --git a/go.mod b/go.mod
index f108e0f..1669511 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/mackerelio/go-osstat
 
-go 1.17
+go 1.18
 
 require golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8