diff --git a/precli/renderers/json.py b/precli/renderers/json.py
index 55078830..471260be 100644
--- a/precli/renderers/json.py
+++ b/precli/renderers/json.py
@@ -67,7 +67,8 @@ def create_rule_array(self, run: Run):
                     text=rule.short_description
                 ),
                 full_description=sarif_om.MultiformatMessageString(
-                    text=rule.full_description
+                    text=rule.full_description,
+                    markdown=rule.full_description
                 ),
                 message_strings={
                     "default": sarif_om.MultiformatMessageString(
diff --git a/precli/rules/__init__.py b/precli/rules/__init__.py
index 12e17250..2a8bc3f0 100644
--- a/precli/rules/__init__.py
+++ b/precli/rules/__init__.py
@@ -84,11 +84,11 @@ def short_description(self) -> str:
         :rtype: str
         """
         try:
-            start = self._full_descr.index("\n\n") + 2
+            start = self._full_descr.index("\n# ") + 3
         except ValueError:
             start = 0
         try:
-            end = self._full_descr.index("\n##")
+            end = self._full_descr.index("\n\n")
         except ValueError:
             end = len(self._full_descr)
         return self._full_descr[start:end]