diff --git a/CHANGELOG.md b/CHANGELOG.md
index 475fe68f4..acbc3348c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 ## Unreleased
 
+### Fixed
+
+- Lock database file with POSIX filesystem advisory lock when database
+  is opened to prevent concurrent processes from corrupting a file.
+  Please note that the locking scheme differs from SQLite, which uses
+  POSIX advisory locks for every transaction. We're defaulting to
+  locking on open because it's faster.
+
 ### Changed
 
 - Install to `~/.limbo/` instead of `CARGO_HOME`.
@@ -10,7 +18,8 @@
 
 ### Added
 
-- Partial `SELECT` statement support, including `WHERE`, `LIKE`, `LIMIT`, `CROSS JOIN`, and `INNER JOIN`.
+- Partial `SELECT` statement support, including `WHERE`, `LIKE`,
+  `LIMIT`, `CROSS JOIN`, and `INNER JOIN`.
 
 - Aggregate function support.
 
@@ -18,7 +27,8 @@
 
 - Partial `PRAGMA` statement support, including `cache_size`.
 
-- Asynchronous I/O support with Linux io_uring using direct I/O and Darwin kqueue.
+- Asynchronous I/O support with Linux io_uring using direct I/O and
+  Darwin kqueue.
 
 - Initial pass on command line shell with following commands:
     - `.schema` command that describes the database schema.