diff --git a/homeassistant/components/slack/notify.py b/homeassistant/components/slack/notify.py
index 5fff857825b..88317b31585 100644
--- a/homeassistant/components/slack/notify.py
+++ b/homeassistant/components/slack/notify.py
@@ -118,7 +118,7 @@ def _async_templatize_blocks(hass, value):
         }
 
     tmpl = template.Template(value, hass=hass)
-    return tmpl.async_render()
+    return tmpl.async_render(parse_result=False)
 
 
 class SlackNotificationService(BaseNotificationService):