diff --git a/utils/helpers.py b/utils/helpers.py
index d3b42a5..3b74cb7 100644
--- a/utils/helpers.py
+++ b/utils/helpers.py
@@ -14,7 +14,8 @@ logger = logging.getLogger(__name__)
 
 # Allowed HTML tags and attributes for rich-text content (announcements, events, proceedings)
 _ALLOWED_TAGS = ['p', 'br', 'strong', 'em', 'b', 'i', 'a', 'ul', 'ol', 'li', 'h3', 'h4', 'blockquote', 'img']
-_ALLOWED_ATTRS = {'a': ['href', 'target', 'rel'], 'img': ['src', 'alt']}
+_ALLOWED_ATTRS = {'a': ['href', 'target', 'rel'], 'img': ['src', 'alt', 'width', 'height', 'style']}
+_ALLOWED_PROTOCOLS = ['http', 'https', 'data']  # data: for base64 inline images
 
 
 def sanitize_html(content):
@@ -30,7 +31,7 @@ def sanitize_html(content):
     """
     if not content:
         return content
-    return bleach.clean(content, tags=_ALLOWED_TAGS, attributes=_ALLOWED_ATTRS, strip=True)
+    return bleach.clean(content, tags=_ALLOWED_TAGS, attributes=_ALLOWED_ATTRS, protocols=_ALLOWED_PROTOCOLS, strip=True)
 
 
 def linkify_urls(html):