diff --git a/packages/pg-protocol/src/testing/test-buffers.ts b/packages/pg-protocol/src/testing/test-buffers.ts
index e0a04a75..a4d49f32 100644
--- a/packages/pg-protocol/src/testing/test-buffers.ts
+++ b/packages/pg-protocol/src/testing/test-buffers.ts
@@ -1,4 +1,4 @@
-// http://developer.postgresql.org/pgdocs/postgres/protocol-message-formats.html
+// https://www.postgresql.org/docs/current/protocol-message-formats.html
 import BufferList from './buffer-list'
 
 const buffers = {