diff --git a/common/bitutil/bitutil_test.go b/common/bitutil/bitutil_test.go
index 307bf731f7..12f3fe24a6 100644
--- a/common/bitutil/bitutil_test.go
+++ b/common/bitutil/bitutil_test.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Adapted from: https://golang.org/src/crypto/cipher/xor_test.go
+// Adapted from: https://go.dev/src/crypto/subtle/xor_test.go
 
 package bitutil