diff --git a/net_go113.go b/net_go113.go
index 9e8186a..be4f740 100644
--- a/net_go113.go
+++ b/net_go113.go
@@ -1,3 +1,4 @@
+//go:build !go1.16
 // +build !go1.16
 
 package soju
diff --git a/net_go116.go b/net_go116.go
index 620621a..e52ffc5 100644
--- a/net_go116.go
+++ b/net_go116.go
@@ -1,3 +1,4 @@
+//go:build go1.16
 // +build go1.16
 
 package soju