diff --git a/planning/utils.py b/planning/utils.py
index 061da11..d2df33a 100644
--- a/planning/utils.py
+++ b/planning/utils.py
@@ -63,7 +63,7 @@ class Program:
output = '
Room | '
room_cell = '%(name)s %(label)s | '
for room, colspan in self.cols.items():
- options = ' colspan="%d"' % colspan
+ options = ' style="min-width: 100px;" colspan="%d"' % colspan
output += room_cell % {'name': escape(room.name), 'label': escape(room.label), 'options': options}
return '%s
' % output