diff --git a/app/assets/stylesheets/framework/buttons.scss b/app/assets/stylesheets/framework/buttons.scss
index 8da3da2ad08b11c08d1e11437330771551f800ec..1c7b2f4df7cc01882f52a1548ae9a5ab74cd9916 100644
--- a/app/assets/stylesheets/framework/buttons.scss
+++ b/app/assets/stylesheets/framework/buttons.scss
@@ -1,7 +1,7 @@
 @mixin btn-default {
   border-radius: 3px;
   font-size: $gl-font-size;
-  font-weight: 500;
+  font-weight: 400;
   padding: $gl-vert-padding $gl-btn-padding;
 
   &:focus,
diff --git a/changelogs/unreleased/update-button-font-weight.yml b/changelogs/unreleased/update-button-font-weight.yml
new file mode 100644
index 0000000000000000000000000000000000000000..ddb3c1c8da4f7c42f1e35743be85a3b8e2a8be13
--- /dev/null
+++ b/changelogs/unreleased/update-button-font-weight.yml
@@ -0,0 +1,4 @@
+---
+title: Updates the font weight of button styles because of the change to system fonts
+merge_request:
+author: