diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index f9d40038..31828628 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -12,6 +12,8 @@ Breaking changes:
   avoid confusions. Use ``make_trainvalidtest_split(test_size=a, valid_size=b)``
   instead of ``make_trainvalidtest_split(a, b)``.
 - Invalid custom kernel specifications are now errors rather than warnings.
+- Default values for ``units_force`` and ``units_acc`` in the custom MD classes
+  ``VelocityVerlet`` and ``LangevinDynamics`` have been removed. 
 
 
 New Features: