diff --git a/CHANGELOG.md b/CHANGELOG.md
index 995ec05416..e71795efe2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 ### Fixes
 
-- [#1818 Fix heading sizes in templates](https://github.com/alphagov/govuk-prototype-kit/pull/1818)
+- [#1818: Fix heading sizes in templates](https://github.com/alphagov/govuk-prototype-kit/pull/1818)
 - [#1814: Stop express complaining if error occurs after res has been sent](https://github.com/alphagov/govuk-prototype-kit/pull/1814)
 - [#1804: Fix previewing templates with JavaScript in management pages](https://github.com/alphagov/govuk-prototype-kit/pull/1804)
 - [#1803: Stop installing dev dependencies when creating prototype](https://github.com/alphagov/govuk-prototype-kit/pull/1803)