diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 714eb8b9..f6f02a52 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -18,6 +18,7 @@
   - `exp` and `Exp` renamed to `exponent` and `Exponent`
   - Added support for `exp()` mathematical support
   - Dimensionless quantities redesigned to be of `quantity` type
+  - `Scalar` concept renamed to `ScalableNumber`
 
 - **0.5.0 May 17, 2020**
   - Major refactoring and rewrite of the library