diff --git a/modoboa_installer/system.py b/modoboa_installer/system.py
index be6a970..469356f 100644
--- a/modoboa_installer/system.py
+++ b/modoboa_installer/system.py
@@ -57,3 +57,8 @@ def enable_and_start_service(name):
     code, output = utils.exec_cmd("service {} status".format(name))
     action = "start" if code else "restart"
     utils.exec_cmd("service {} {}".format(name, action))
+
+
+def restart_service(name):
+    """Restart a service."""
+    utils.exec_cmd("service {} restart".format(name))
diff --git a/run.py b/run.py
index f370f9e..4e6fb9a 100755
--- a/run.py
+++ b/run.py
@@ -13,6 +13,7 @@ from modoboa_installer import compatibility_matrix
 from modoboa_installer import package
 from modoboa_installer import scripts
 from modoboa_installer import ssl
+from modoboa_installer import system
 from modoboa_installer import utils
 
 
@@ -99,6 +100,7 @@ def main(input_args):
     scripts.install("opendkim", config)
     scripts.install("postfix", config)
     scripts.install("dovecot", config)
+    system.restart_service("cron")
     utils.printcolor(
         "Congratulations! You can enjoy Modoboa at https://{} (admin:password)"
         .format(config.get("general", "hostname")),