diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4303ad8cb..8f4b340b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -71,6 +71,7 @@ Thankyou! -->
     2. Clarify how to reference profiles in metadata #1056
         * Updated the description of `metadata.profiles` to clarify the correct way to reference a profile in that list.
     3. Added a `gitignore` file. #1071
+    4. New Extension registration for Cisco #1074
 
 ## [v1.2.0] - April 23rd, 2024
 
diff --git a/extensions.md b/extensions.md
index bbd191446..ef3838d9d 100644
--- a/extensions.md
+++ b/extensions.md
@@ -3,6 +3,7 @@ The purpose of this file is to keep track of and avoid collisions in Extension `
 
 | Caption     | Name     | UID | Notes |
 |-------------|----------|-----|-------|
+| Cisco       | cisco    | **991** | The Cisco schema extension |
 | Sedara      | sedara   | **992** | The Sedara schema extension |
 | Sciber      | sciber   | **993** | The Sciber schema extension |
 | DataBee     | databee  | **994** | The Comcast DataBee schema extension |