diff --git a/matemat/webserver/httpd.py b/matemat/webserver/httpd.py
index e5d1003..8d72d61 100644
--- a/matemat/webserver/httpd.py
+++ b/matemat/webserver/httpd.py
@@ -321,9 +321,13 @@ class MatematWebserver(object):
 
     def _cron_runner(self, fun: Callable[[Dict[str, str], jinja2.Environment, logging.Logger], None]):
         self._httpd.logger.info('Executing cron job "%s"', fun.__name__)
-        fun(self._httpd.pagelet_variables,
-            self._httpd.jinja_env,
-            self._httpd.logger)
+        try:
+            fun(self._httpd.pagelet_variables,
+                self._httpd.jinja_env,
+                self._httpd.logger)
+            self._httpd.logger.info('Completed cron job "%s"', fun.__name__)
+        except BaseException as e:
+            self._httpd.logger.exception('Cron job "%s" failed:', fun.__name__, exc_info=e)
 
 
 class HttpHandler(BaseHTTPRequestHandler):