diff --git a/errbot/backends/slack.py b/errbot/backends/slack.py
index db92ce3fb..3320e6822 100644
--- a/errbot/backends/slack.py
+++ b/errbot/backends/slack.py
@@ -721,6 +721,8 @@ def send_card(self, card: Card):
         if card.fields:
             attachment['fields'] = [{'title': key, 'value': value, 'short': True} for key, value in card.fields]
 
+        attachment['mrkdwn_in'] = ['text', 'pretext']
+
         data = {
             'text': ' ',
             'channel': to_channel_id,