diff --git a/CHANGELOG.md b/CHANGELOG.md
index a20653a3..f4782203 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Font paths fixed for prototype kit, stylesheets and JavaScript loading
 - Better alignment of site name next to logo in header
 - Fixed right/left padding of logo and hamburger on small devices
+- Change Supria Sans weight from `400` to `500` (medium, as provided by TypeKit)
 - Card image type is now variable when using sources
 
 ### Security
diff --git a/src/nationalarchives/variables/_typography.scss b/src/nationalarchives/variables/_typography.scss
index 68c8a218..5bb4ff5f 100644
--- a/src/nationalarchives/variables/_typography.scss
+++ b/src/nationalarchives/variables/_typography.scss
@@ -13,7 +13,7 @@ $font-weight-main: normal !default; // Defined in utilities/_typography.scss
 $font-weight-main-bold: bold !default; // Defined in utilities/_typography.scss
 
 $font-family-heading: supria-sans-condensed, "Arial Narrow", sans-serif !default;
-$font-weight-heading: 400 !default;
+$font-weight-heading: 500 !default;
 
 $font-family-detail: "Roboto Mono", monospace !default;
 $font-weight-detail: normal !default;