diff --git a/utils/duration.util.js b/utils/duration.util.js
index 2c284b5..e5614e3 100644
--- a/utils/duration.util.js
+++ b/utils/duration.util.js
@@ -28,6 +28,7 @@ function estimateBlockDuration(block) {
   switch (block.type) {
     case "text":
     case "markdown":
+    case "document":
       return readingSecs(block.content?.body);
 
     case "image":