diff --git a/setup.py b/setup.py
index ee5848eb6..80c4fc85c 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
         'django-gravatar2~=1.4',
         'django-guardian~=2.3',
         'fits2image==0.4.3',
-        'Markdown==3.3.4',  # django-rest-framework doc headers require this to support Markdown
+        'Markdown==3.3.5',  # django-rest-framework doc headers require this to support Markdown
         'numpy~=1.20',
         'pillow==8.2.0',
         'plotly~=5.0',