diff --git a/biscuit/apps/chronos/static/css/chronos/timetable.css b/biscuit/apps/chronos/static/css/chronos/timetable.css
new file mode 100644
index 0000000000000000000000000000000000000000..6b692ce69e65188b09442c7b11160ecbd93eb088
--- /dev/null
+++ b/biscuit/apps/chronos/static/css/chronos/timetable.css
@@ -0,0 +1,3 @@
+.chronos-lesson {
+    height: 6em;
+}
diff --git a/biscuit/apps/chronos/templates/chronos/tt_week.html b/biscuit/apps/chronos/templates/chronos/tt_week.html
index ffde471ac8a1ef596e4b21cc20b1e5f7d9e6e827..7293aa68541b51d414f45df68ae51d15dc86e750 100644
--- a/biscuit/apps/chronos/templates/chronos/tt_week.html
+++ b/biscuit/apps/chronos/templates/chronos/tt_week.html
@@ -1,6 +1,11 @@
 {# -*- engine:django -*- #}
 {% extends "core/base.html" %}
-{% load bootstrap4 data_helpers i18n %}
+{% load bootstrap4 data_helpers i18n staticfiles %}
+
+{% block bootstrap4_extra_head %}
+ {{ block.super }}
+ <link rel="stylesheet" href="{% static 'css/chronos/timetable.css' %}" />
+{% endblock %}
 
 {% block page_title %}Timetable{% endblock %}