diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46617bd..5c3e869 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.4.0
+
+### Breaking Changes
+
+- Update `memory_addr` to `0.3.0`, which is not backward compatible with `0.2.0`.
+
 ## 0.3.3
 
 - Support the use of `page_table_entry` at the ARM EL2 privilege level (via the `arm-el2` feature).