diff --git a/validata_ui/__init__.py b/validata_ui/__init__.py
index c58a03a0357e492fb42bdb69e3d703d3fa9d9834..6a4ab2e84e0edbbeb60356cd1b6d229957c1d299 100644
--- a/validata_ui/__init__.py
+++ b/validata_ui/__init__.py
@@ -11,6 +11,7 @@ import jinja2
 import pkg_resources
 import requests
 import tableschema
+from commonmark import commonmark
 
 import opendataschema
 
@@ -97,6 +98,15 @@ def urlencode(context, value):
     return quote_plus(value)
 
 
+@jinja2.contextfilter
+@blueprint.app_template_filter()
+def commonmark2html(context, value):
+    return commonmark(value)
+
+
+app.register_blueprint(blueprint)
+
+
 @app.context_processor
 def inject_version():
     global VERSION
diff --git a/validata_ui/templates/validation_macros.html b/validata_ui/templates/validation_macros.html
index 8b88bb0893ec0a9d8d0b8728643a15ae0c92ed11..45b96a13766e5c96c5de63291b06e8441cc41c26 100644
--- a/validata_ui/templates/validation_macros.html
+++ b/validata_ui/templates/validation_macros.html
@@ -73,7 +73,7 @@
         <thead class="thead-light">
             <th scope="col">1</th>
             {% for h in source_data.header %}
-            <th scope="col" data-toggle="popover" title="{{ report.table.headers_title[loop.index - 1] }}" data-content="{{ report.table.headers_description[loop.index - 1]}}">{{
+            <th scope="col" data-toggle="popover" title="{{ report.table.headers_title[loop.index - 1]}}" data-content="{{ report.table.headers_description[loop.index - 1] | commonmark2html | escape}}">{{
                 h }}</th>
             {% endfor %}
         </thead>