diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 877b07d7..dcc8f908 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -3,6 +3,7 @@
 - **0.8.0 WIP**
   - (!) refactor: `common_quantity`, `common_quantity_for`, `common_quantity_point`, `common_quantity_kind`, and `common_quantity_point_kind` removed
   - refactor: `quantity` `op+()` and `op-()` reimplemented in terms of `reference` rather then `quantity` types
+  - feat: HEP system support added (thanks [@RalphSteinhagen](https://github.com/RalphSteinhagen))
   - (!) fix: add `quantity_point::origin`, like `std::chrono::time_point::clock`
   - fix: account for different dimensions in `quantity_point_cast`'s constraint
   - build: doxygen updated to 1.9.2