diff --git a/CHANGELOG.md b/CHANGELOG.md
index 406741f71..bc35f1a3a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,27 @@
 # Changelog
 
+## [1.43.5] — 2026-10-18
+
+### Fixed
+
+- **Backups of accounts with many documents no longer run out of memory.**
+  The weekly in-database backup, the manual backup and the restore held the
+  document vault and ECG traces in memory several times over (bytes, base64,
+  the serialised section and the preview check), and sealed one oversized
+  chunk; an account with a large document vault crashed a 524 MB heap. Document
+  bytes are now read and written in 1.5 MB slices, ECG traces page by page,
+  every section is written element by element and no chunk exceeds the chunk
+  size. The restore reads documents without their bytes first and writes each
+  one on its own. The file format is unchanged (Refs #1239).
+- A failed tombstone purge names its phase and condition (e.g.
+  `statement_timeout`) instead of a bare error.
+
+### Added
+
+- The admin support report and System status flag a heap limit below 700 MB
+  and point to `APP_MEMORY_LIMIT`; `/api/admin/status` carries
+  `memory: { heapLimitMb, low }`.
+
 ## [1.43.4] — 2026-10-17
 
 ### Fixed
diff --git a/docs/api/openapi.yaml b/docs/api/openapi.yaml
index 93399bf62..626d0e6b9 100644
--- a/docs/api/openapi.yaml
+++ b/docs/api/openapi.yaml
@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.43.4
+  version: 1.43.5
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.
 
diff --git a/package.json b/package.json
index 7fc5051e8..6dab1f0ab 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "healthlog",
-  "version": "1.43.4",
+  "version": "1.43.5",
   "description": "Self-hosted personal-health-tracking PWA with Withings integration, AI insights, and doctor-report PDF export.",
   "license": "PolyForm-Noncommercial-1.0.0",
   "homepage": "https://healthlog.dev",
diff --git a/public/sw.js b/public/sw.js
index c867722b4..62fac31c7 100644
--- a/public/sw.js
+++ b/public/sw.js
@@ -36,7 +36,7 @@ try {
 // v1.4.38.4 → v1.4.42. Do not hand-edit; bump `package.json` and rebuild.
 const CACHE_VERSION =
   (typeof self !== "undefined" && self.__APP_VERSION__) ||
-  /* @sw-version-fallback */ "v1.43.4";
+  /* @sw-version-fallback */ "v1.43.5";
 const STATIC_CACHE = `healthlog-static-${CACHE_VERSION}`;
 const PAGE_CACHE = `healthlog-pages-${CACHE_VERSION}`;
 // v1.18.6 — read-only data cache for a curated allowlist of safe GET `/api/*`