diff --git a/apps/api/plane/utils/content_validator.py b/apps/api/plane/utils/content_validator.py
index 2fcabd69f50..cf7c235ee82 100644
--- a/apps/api/plane/utils/content_validator.py
+++ b/apps/api/plane/utils/content_validator.py
@@ -84,6 +84,8 @@ def validate_binary_data(data):
         "aria-label",
         "aria-hidden",
         "style",
+        "start",
+        "type",
         # common editor data-* attributes seen in stored HTML
         # (wildcards like data-* are NOT supported by nh3; we add known keys
         # here and dynamically include all data-* seen in the input below)