diff --git a/webtrees/CHANGELOG.md b/webtrees/CHANGELOG.md
index e2ea80b00b..428b21cdda 100644
--- a/webtrees/CHANGELOG.md
+++ b/webtrees/CHANGELOG.md
@@ -1,4 +1,7 @@
 
+## 2.2.6.1 (2026-08-05)
+- Fix custom modules failing to install from the webtrees UI (e.g. with the Custom Module Manager plugin) : /config/modules_v4 was left owned by the base image's original www-data uid (33) while the app runs as PUID:PGID, so it was not writable (https://github.com/alexbelgium/hassio-addons/issues/2940)
+
 ## 2.2.6 (2026-05-09)
 - Update to latest version from nathanvaughn/webtrees-docker (changelog : https://github.com/nathanvaughn/webtrees-docker/releases)
 
diff --git a/webtrees/config.yaml b/webtrees/config.yaml
index 7a347f6793..8cfcf1b5cf 100644
--- a/webtrees/config.yaml
+++ b/webtrees/config.yaml
@@ -117,5 +117,5 @@ services:
 slug: webtrees
 udev: true
 url: https://github.com/alexbelgium/hassio-addons
-version: "2.2.6"
+version: "2.2.6.1"
 webui: "[PROTO:ssl]://[HOST]:[PORT:80]"
diff --git a/webtrees/rootfs/etc/cont-init.d/99-run.sh b/webtrees/rootfs/etc/cont-init.d/99-run.sh
index 27b8062cfe..e4f55dd621 100755
--- a/webtrees/rootfs/etc/cont-init.d/99-run.sh
+++ b/webtrees/rootfs/etc/cont-init.d/99-run.sh
@@ -56,10 +56,15 @@ rm -r /var2/www/webtrees/modules_v4
 ln -sf "/config/modules_v4" /var2/www/webtrees/modules_v4
 
 # Update permissions on target directories
+# /docker-entrypoint.py renumbers www-data to PUID:PGID (usermod/groupmod) after this
+# script has run, and then only re-chowns its DATA_DIR. Chowning by name here would
+# therefore leave everything else -- notably /config/modules_v4 -- owned by the image's
+# original www-data uid (33), which the running Apache/PHP process can no longer write to.
+# Chown by the numeric ids the app will actually run as instead.
 echo "... update permissions"
-chown -R www-data:www-data "$DATA_LOCATION"
+chown -R "${PUID:-1000}:${PGID:-1000}" "$DATA_LOCATION"
 chmod -R 755 "$DATA_LOCATION"
-chown -R www-data:www-data "/config"
+chown -R "${PUID:-1000}:${PGID:-1000}" "/config"
 chmod -R 755 "/config"
 
 # Remove /data/data