diff --git a/CHANGELOG.md b/CHANGELOG.md
index 084e783b91..b8e90c376f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Breaking changes
 
+- [Pull request #925: Upgrade Notify client library from 4.7.2 to 5.1.0](https://github.com/alphagov/govuk-prototype-kit/pull/925). This may break existing prototypes which are using the Notify client. If you have any issues, please [contact the GOV.UK Prototype Kit team](https://design-system.service.gov.uk/get-in-touch/).
 - [Pull request #1127: Update to Node 16 and drop support for Node 10](https://github.com/alphagov/govuk-prototype-kit/pull/1127)
 
 ## Fixes
diff --git a/package.json b/package.json
index b70fe97294..7c03a04fc6 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "keypather": "^3.0.0",
     "marked": "^3.0.8",
     "node-sass": "^6.0.1",
-    "notifications-node-client": "^4.7.2",
+    "notifications-node-client": "^5.1.0",
     "nunjucks": "^3.2.1",
     "portscanner": "^2.1.1",
     "require-dir": "^1.0.0",