diff --git a/systemd/crypto-trader.timer b/systemd/crypto-trader.timer
index e7a7f6f..00e0d2c 100644
--- a/systemd/crypto-trader.timer
+++ b/systemd/crypto-trader.timer
@@ -4,7 +4,7 @@ Requires=crypto-trader.service
 
 [Timer]
 # Runs once every hour.
-OnCalendar=hourly
+OnCalendar=*:0/15
 
 # If the system was off at a scheduled time, run once when it comes back up
 Persistent=true