diff --git a/contents/codes/451.md b/contents/codes/451.md
index 7d5bfce..41223d3 100644
--- a/contents/codes/451.md
+++ b/contents/codes/451.md
@@ -47,7 +47,7 @@ method definition or explicit cache controls; see [RFC7234][2].
 
 ---
 
-* Source: [draft-ietf-httpbis-legally-restricted-status][1]
+* Source: [RFC 7725][1]
 
-[1]: <https://tools.ietf.org/html/draft-ietf-httpbis-legally-restricted-status-03>
-[2]: <https://tools.ietf.org/html/rfc7234>
\ No newline at end of file
+[1]: <http://tools.ietf.org/html/rfc7725>
+[2]: <https://tools.ietf.org/html/rfc7234>