diff --git a/accept.go b/accept.go
index 18536bdb..b5447131 100644
--- a/accept.go
+++ b/accept.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/accept_test.go b/accept_test.go
index e114d1ad..553b90ad 100644
--- a/accept_test.go
+++ b/accept_test.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/autobahn_test.go b/autobahn_test.go
index e56a4912..247f4a47 100644
--- a/autobahn_test.go
+++ b/autobahn_test.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket_test
diff --git a/close_notjs.go b/close_notjs.go
index 4251311d..8cafaa9d 100644
--- a/close_notjs.go
+++ b/close_notjs.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/close_test.go b/close_test.go
index 00a48d9e..6bf3c256 100644
--- a/close_test.go
+++ b/close_test.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/compress_notjs.go b/compress_notjs.go
index 809a272c..e094513b 100644
--- a/compress_notjs.go
+++ b/compress_notjs.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/compress_test.go b/compress_test.go
index 2c4c896c..7b0e3a68 100644
--- a/compress_test.go
+++ b/compress_test.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/conn_notjs.go b/conn_notjs.go
index 0c85ab77..3c1361c5 100644
--- a/conn_notjs.go
+++ b/conn_notjs.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/dial.go b/dial.go
index 7a7787ff..7b91713e 100644
--- a/dial.go
+++ b/dial.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/dial_test.go b/dial_test.go
index 28c255c6..e5f8ab3d 100644
--- a/dial_test.go
+++ b/dial_test.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/doc.go b/doc.go
index efa920e3..80772bf6 100644
--- a/doc.go
+++ b/doc.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 // Package websocket implements the RFC 6455 WebSocket protocol.
diff --git a/export_test.go b/export_test.go
index 88b82c9f..d618a154 100644
--- a/export_test.go
+++ b/export_test.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/internal/test/wstest/pipe.go b/internal/test/wstest/pipe.go
index 1534f316..934ecf5e 100644
--- a/internal/test/wstest/pipe.go
+++ b/internal/test/wstest/pipe.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package wstest
diff --git a/read.go b/read.go
index 89a00988..06abe8da 100644
--- a/read.go
+++ b/read.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket
diff --git a/write.go b/write.go
index 2210cf81..9528e5ac 100644
--- a/write.go
+++ b/write.go
@@ -1,3 +1,4 @@
+//go:build !js
 // +build !js
 
 package websocket