diff --git a/CHANGELOG.md b/CHANGELOG.md
index 293d07c..f1df7ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - **Column-header tooltips clipped** – Tooltips on the members-overview column headers are no longer clipped by the sticky table header.
 - **Text selection opens member** – Dragging to select text in a members-overview row (for example to copy an email) no longer opens the member details; a plain click still opens them.
 - **Sort by custom date** – Sorting the member list or member export by a custom date field now orders rows chronologically instead of like text, so e.g. 29.01.1981 correctly comes before 01.03.1982.
+- **Concurrent member creation no longer deadlocks** – Creating members in parallel (e.g. simultaneous sign-ups, or batch operations) could intermittently fail with a PostgreSQL deadlock; the affected foreign keys are now deferrable, so concurrent member creation succeeds reliably.
 
 ## [1.2.0] - 2026-05-08