diff --git a/readme.md b/readme.md
index 7faf5da..62bac01 100644
--- a/readme.md
+++ b/readme.md
@@ -43,4 +43,4 @@ services:
 ### Optional environment variables
 
 - `RUN_ONCE`: set to `true` to run the script immediately on container start.
-- `CRON_SCHEDULE`: sets the cron schedule for running the script (default: "0 */12* **")
+- `CRON_SCHEDULE`: sets the cron schedule for running the script (default: `"0 */12 * * *"`)