diff --git a/CLIENT-SPECIFICATION.md b/CLIENT-SPECIFICATION.md
index 58913a56b1f91..84d514c1bf9f7 100644
--- a/CLIENT-SPECIFICATION.md
+++ b/CLIENT-SPECIFICATION.md
@@ -1,6 +1,6 @@
 # tldr-pages client specification
 
-**Current Specification Version:** 1.4
+**Current Specification Version:** 1.5
 
 This document contains the official specification for tldr-pages clients. It is _not_ a specification of the format of the pages themselves - only a specification of how a user should be able to interface with an official client. For a list of previous versions of the specification, see the [changelog section](#Changelog) below.
 
@@ -212,6 +212,10 @@ Caching SHOULD be done according to the user's language configuration (if any),
 
 ## Changelog
 
+ - [v1.5, March 17th 2021](https://github.com/tldr-pages/tldr/blob/v1.5/CLIENT-SPECIFICATION.md) ([#5428](https://github.com/tldr-pages/tldr/pull/5428))
+   - Add requirement for converting command names to lowercase before running the page resolution algorithm.
+   - Use HTTPS for archive links.
+
  - [v1.4, August 13th 2020](https://github.com/tldr-pages/tldr/blob/87324c6e540c10a44950b14cd9fb7d758ce4d4e0/CLIENT-SPECIFICATION.md) ([#4246](https://github.com/tldr-pages/tldr/pull/4246))
    - Add requirement for CLI clients to use non-zero exit code on failing to find a page.