diff --git a/Dockerfile b/Dockerfile
index 1486502..56d92f6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ RUN apt-get update && apt-get install -y cron
 RUN chmod 0644 /etc/cron.d/django_crons_jobs && crontab /etc/cron.d/django_crons_jobs && touch /var/log/cron.log
 
 
-RUN apt update && apt install cron && pip install --no-cache-dir -r requirements.txt
+RUN docpip install --no-cache-dir -r requirements.txt
 RUN python manage.py makemigrations && python manage.py migrate
 
 
diff --git a/mycaldav/cron.py b/mycaldav/cron.py
index 6283bf0..ba71a20 100644
--- a/mycaldav/cron.py
+++ b/mycaldav/cron.py
@@ -5,8 +5,9 @@ import django
 
 class InitTaskSync(CronJobBase):
     RUN_AT_TIMES = ['07:00', '19:00']
+    RUN_EVERY_MIN = 1
 
-    schedule = Schedule(run_at_times=RUN_AT_TIMES,)
+    schedule = Schedule(run_every_mins=RUN_EVERY_MIN,)
     code = 'mycaldav.init_sync_task'    # Un code unique pour votre tâche cron
 
     def do(self):