diff --git a/README.md b/README.md
index 3da312619fee755544999175d184bbef1b66d1ef..e7c47de06a551658c714acfe8f82179934aded0f 100644
--- a/README.md
+++ b/README.md
@@ -19,3 +19,9 @@ You can then run the script as a cron job :
 ```
 */15 * * * * python /home/user/gandi-ddns.py
 ```
+
+But to be nice to the API servers, you should choose a random offset, for example to run at 2 minutes after the hour, and then every 15 minutes :
+
+```
+2-59/15 * * * * python /home/user/gandi-ddns.py
+```