diff --git a/CHANGELOG.md b/CHANGELOG.md
index 045e6333..a43812cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@
 - **ES2017**
   - Support `async function` ([50452a1](https://github.com/esdoc/esdoc/commit/50452a1e44a1c8908da1fb377d3aa51eba220256))
   - Support `trailing comma` ([dc9ba0f](https://github.com/esdoc/esdoc/commit/dc9ba0fd904adbc1519f27c15fab104f1a4414a5))
+- **Experimental Proposal**  
+  - Support `class properties` ([c7b4d9b](https://github.com/esdoc/esdoc/commit/c7b4d9b415812cf18c451b1a452c9725593d3891))
 - **Internal**
   - Update to babel6 ([149914e](https://github.com/esdoc/esdoc/commit/149914e84cb3bb061f2bdf2e43af00178b131a9e))
   - Refactor test code ([#324](https://github.com/esdoc/esdoc/pull/324))