diff --git a/README.md b/README.md
index c9ee945..7ae3f3b 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,11 @@
 
 Firebird Butler repository for specifications, descriptions and other project-wide documents in their source formats. The primary purpose is to collect specifications for APIs, file formats, wire protocols, and processes.
 
-The change process is C4: http://firebird-butler.rtfd.io/rfc/1/C4.html with a few modifications:
+The change process is C4: http://firebird-butler.rtfd.io/en/latest/rfc/1/C4.html with a few modifications:
 
 - A specification is created and modified by pull requests according to C4.
 - Each specification has an editor who publishes the RFC to Butler repository as needed.
-- Specification life-cycle SHOULD follow the life-cycle defined in COSS: http://firebird-butler.rtfd.io/rfc/2/COSS.html
+- Specification life-cycle SHOULD follow the life-cycle defined in COSS: http://firebird-butler.rtfd.io/en/latest/rfc/2/COSS.html
 - Non-cosmetic changes are allowed only on Raw and Draft specifications.
 
 All published specifications and other related documents in HTML and other readable formats are available at http://firebird-butler.rtfd.io