diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76489e5..7512694 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- Support for Linear Ticket prefix (OB)
+- Support for Linear Ticket prefix (AP | MS)
 
 ## [3.3.0] - 2024-11-20
 
diff --git a/src/startUpdateDependents.ts b/src/startUpdateDependents.ts
index 76ddbc3..cb36234 100644
--- a/src/startUpdateDependents.ts
+++ b/src/startUpdateDependents.ts
@@ -31,11 +31,11 @@ export default async function startUpdateDependents({ cwd }: { cwd: string }) {
   }>({
     type: 'input',
     name: 'ticket',
-    message: `Ticket to associate with pull requests? (e.g. ON-4323, OB-4323)`,
+    message: `Ticket to associate with pull requests? (e.g. ON-4323, AP-4323, MS-4323)`,
     required: true,
     validate: (input) => {
-      if (!/^(ON-|OB-)\d+$/i.test(input)) {
-        return 'Ticket must be "ON-" or "OB-" followed by a number'
+      if (!/^[a-z]{1,3}-\d+$/i.test(input)) {
+        return 'Ticket must be 1-3 alpha characters, then a hyphen followed by a number'
       }
       return true
     },