diff --git a/measurement/crontab b/measurement/crontab
index 9623f0c..941f8c5 100644
--- a/measurement/crontab
+++ b/measurement/crontab
@@ -1,2 +1,2 @@
-*/15 * * * * cd /app && /usr/local/bin/python3 run_speedtest.py >> /proc/1/fd/1 2>> /proc/1/fd/2
+4-59/15 * * * * cd /app && /usr/local/bin/python3 run_speedtest.py >> /proc/1/fd/1 2>> /proc/1/fd/2
 # Empty line required at the end!