diff --git a/seafile/CHANGELOG.md b/seafile/CHANGELOG.md
index bbb889c2b..9bca56a89 100644
--- a/seafile/CHANGELOG.md
+++ b/seafile/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 - Added support for configuring extra environment variables via the `env_vars` add-on option alongside config.yaml. See https://github.com/alexbelgium/hassio-addons/wiki/Add-Environment-variables-to-your-Addon-2 for details.
 
+## 12.0.15 (18-12-2025)
+- Normalize `SERVICE_URL` and `FILE_SERVER_ROOT` values in `conf/seahub_settings.py` based on the add-on configuration to generate valid download links.
+
 ## 12.0.14 (13-09-2025)
 - Update to latest version from franchetti/seafile-arm
 
diff --git a/seafile/README.md b/seafile/README.md
index 3847784a5..13947e27d 100644
--- a/seafile/README.md
+++ b/seafile/README.md
@@ -64,6 +64,8 @@ Webui can be found at <http://homeassistant:8000> (Seahub) and <http://homeassis
 3. Configure database (SQLite default, MariaDB recommended for production)
 4. Set proper file server root URL for external access
 
+> **File server URL**: The add-on now writes `SERVICE_URL` and `FILE_SERVER_ROOT` directly to `conf/seahub_settings.py`. `SERVICE_URL` uses the `url` option when set (otherwise `SERVER_IP` with port `8000`), while `FILE_SERVER_ROOT` follows the `FILE_SERVER_ROOT` option (defaulting to `http://<your host>:8082`). Keep `FILE_SERVER_ROOT` aligned with your accessible file server endpoint so download links resolve correctly.
+
 ### Options
 
 | Option | Type | Default | Description |
diff --git a/seafile/config.yaml b/seafile/config.yaml
index 567ae0378..101336a62 100644
--- a/seafile/config.yaml
+++ b/seafile/config.yaml
@@ -128,5 +128,5 @@ services:
 slug: seafile
 udev: true
 url: https://github.com/alexbelgium/hassio-addons/tree/master/seafile
-version: 12.0.14
+version: 12.0.15
 webui: http://[HOST]:[PORT:8000]
diff --git a/seafile/rootfs/etc/cont-init.d/99-run.sh b/seafile/rootfs/etc/cont-init.d/99-run.sh
index 180dad823..81d31fd9e 100755
--- a/seafile/rootfs/etc/cont-init.d/99-run.sh
+++ b/seafile/rootfs/etc/cont-init.d/99-run.sh
@@ -65,6 +65,54 @@ sed -i "s|/shared|$DATA_LOCATION|g" /docker_entrypoint.sh
 sed -i "s|/shared|$DATA_LOCATION|g" /home/seafile/*.sh
 #sed -i "s=cp -r ./media $DATA_LOCATION/=chown -R seafile:seafile $DATA_LOCATION/* && chmod -R 777 $DATA_LOCATION/media && cp -rnf ./media/. $DATA_LOCATION/media ||true=g" /home/seafile/*.sh
 
+#############################################
+# Configure service URL and file server root #
+#############################################
+
+bashio::log.info "Configuring Seafile URLs"
+
+SERVER_IP_CONFIG=$(bashio::config 'SERVER_IP')
+SERVICE_URL_CONFIG=$(bashio::config 'url')
+FILE_SERVER_ROOT_CONFIG=$(bashio::config 'FILE_SERVER_ROOT')
+FILE_PORT_CONFIG=$(bashio::config 'PORT')
+
+DEFAULT_HOST=${SERVER_IP_CONFIG:-homeassistant.local}
+DEFAULT_FILE_PORT=${FILE_PORT_CONFIG:-8082}
+
+normalize_url() {
+    local raw_url="${1%/}"
+    local default_scheme="$2"
+
+    if [[ -z "${raw_url}" || "${raw_url}" == "null" ]]; then
+        echo ""
+        return
+    fi
+
+    if [[ "${raw_url}" =~ ^https?:// ]]; then
+        echo "${raw_url}"
+    else
+        echo "${default_scheme}://${raw_url}"
+    fi
+}
+
+SERVICE_URL_VALUE=$(normalize_url "${SERVICE_URL_CONFIG:-${DEFAULT_HOST}:8000}" "http")
+FILE_SERVER_ROOT_VALUE=$(normalize_url "${FILE_SERVER_ROOT_CONFIG:-${DEFAULT_HOST}:${DEFAULT_FILE_PORT}}" "http")
+
+SEAHUB_SETTINGS_FILE="${DATA_LOCATION}/conf/seahub_settings.py"
+mkdir -p "$(dirname "${SEAHUB_SETTINGS_FILE}")"
+touch "${SEAHUB_SETTINGS_FILE}"
+
+sed -i '/^SERVICE_URL *=/d' "${SEAHUB_SETTINGS_FILE}"
+sed -i '/^FILE_SERVER_ROOT *=/d' "${SEAHUB_SETTINGS_FILE}"
+
+{
+    echo "SERVICE_URL = \"${SERVICE_URL_VALUE}\""
+    echo "FILE_SERVER_ROOT = \"${FILE_SERVER_ROOT_VALUE}\""
+} >> "${SEAHUB_SETTINGS_FILE}"
+
+bashio::log.info "SERVICE_URL set to ${SERVICE_URL_VALUE}"
+bashio::log.info "FILE_SERVER_ROOT set to ${FILE_SERVER_ROOT_VALUE}"
+
 ###################
 # Define database #
 ###################
diff --git a/seafile/updater.json b/seafile/updater.json
index d385e56fb..b1147b1ed 100644
--- a/seafile/updater.json
+++ b/seafile/updater.json
@@ -1,6 +1,6 @@
 {
   "github_fulltag": "true",
-  "last_update": "13-09-2025",
+  "last_update": "18-12-2025",
   "paused": false,
   "repository": "alexbelgium/hassio-addons",
   "slug": "seafile",