diff --git a/aircox/conf.py b/aircox/conf.py
index e7e9a53..5c46cc0 100755
--- a/aircox/conf.py
+++ b/aircox/conf.py
@@ -181,8 +181,8 @@ class Settings(BaseSettings):
     """Allow comments."""
 
     # ---- bleach
-    ALLOWED_TAGS = [*sanitizer.ALLOWED_TAGS, "br", "p", "h3", "h4", "h5"]
-    ALLOWED_ATTRIBUTES = sanitizer.ALLOWED_ATTRIBUTES
+    ALLOWED_TAGS = [*sanitizer.ALLOWED_TAGS, "br", "p", "hr", "h2", "h3", "h4", "h5", "iframe", "pre"]
+    ALLOWED_ATTRIBUTES = [*sanitizer.ALLOWED_ATTRIBUTES, "src", "width", "height", "frameborder"]
     ALLOWED_PROTOCOLS = sanitizer.ALLOWED_PROTOCOLS