diff --git a/README.md b/README.md
index 9273db489..7dd74e004 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Komga is a free an open source comics/mangas server.
 
 Komga just started, and for now it can:
 
-- scan and index a folder containing comic book archives in `cbz` and `cbr` format
+- scan and index a folder containing comic book archives in `cbz` and `cbr` format. Rescan periodically.
 - serve the individual pages of those books via an API
 - serve the complete file via an API
 
diff --git a/doc/docker-compose.yml b/doc/docker-compose.yml
index 78cfe5225..d4957731a 100644
--- a/doc/docker-compose.yml
+++ b/doc/docker-compose.yml
@@ -14,6 +14,7 @@ services:
       - SPRING_PROFILES_ACTIVE=prod
       - SPRING_DATASOURCE_URL=jdbc:h2:/config/database.h2;DB_CLOSE_DELAY=-1
       - KOMGA_ROOT_FOLDER=/books
+      - KOMGA_ROOT_FOLDER_SCAN_CRON="0 0 * * * ?" # periodic scan every hour
       - KOMGA_USER_PASSWORD=your-admin-password
       - KOMGA_ADMIN_PASSWORD=your-user-password
     restart: unless-stopped