diff --git a/README.md b/README.md
index 583797e..85de71e 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,8 @@ Commits to this git repository will automagically update the live version!
 
 (Multifeeder runs as a `supervisor` service, see `/etc/supervisor/conf.d/multifeeder.conf`.)
 
+The API is updated every 10 minutes.
+
 ## API
 
 **/API/latest/[num]**