diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index bcbcb43310f344c172a1c7b2ce9e09fc43a543ff..cab0f383a146d32db3c4bc561d6b9609f85fea51 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -11,6 +11,7 @@ CHANGELOG
 * Changes and new features:
 
   * to_netcdf function changes the type argument to nc_type
+  * Memory usage optimization
   * Bugfixes
 
 1.1.4