diff --git a/History.markdown b/History.markdown
index 0e818280..f603cbd3 100644
--- a/History.markdown
+++ b/History.markdown
@@ -15,6 +15,7 @@
   * Switch `PluginManager` to use `require_with_graceful_fail` for better UX (#4233)
   * Allow quoted date in front matter defaults (#4184)
   * Add a Jekyll doctor warning for URLs that only differ by case (#3171)
+  * drops: create one base Drop class which can be set as mutable or not (#4285)
 
 ### Bug Fixes