diff --git a/web/templatetags/templatetags.py b/web/templatetags/templatetags.py
index e1c97c88e..5bb897b6a 100644
--- a/web/templatetags/templatetags.py
+++ b/web/templatetags/templatetags.py
@@ -6,6 +6,9 @@
 @register.inclusion_tag('concept_card.html')
 def concept_card(code, comment):
     """tag for a single concept"""
+    if isinstance(comment, list):
+        comment = "\n".join(comment)
+
     return {
         'code': code,
         'comment': comment