diff --git a/lib/convert-worker.js b/lib/convert-worker.js
index 7e36b60..136db35 100644
--- a/lib/convert-worker.js
+++ b/lib/convert-worker.js
@@ -554,6 +554,9 @@ function fixCapitalization(xml, book) {
   xml = xml.replace(/(?<!mom), dad(?![a-z])/g, ", Dad");
   xml = xml.replace(/, mom(?![a-z-])/g, ", Mom");
 
+  // Similarly, specific aunts and uncles get capitalized when used as a title. This one is often missed.
+  xml = xml.replace(/aunt Sarah/g, "Aunt Sarah");
+
   // The majority of "Wardens’ headquarters" is lowercased, and always prefixed with "the", indicating it's not a proper
   // place name. So we remove the capitalization in the few places where it does appear.
   xml = xml.replace(/Wardens’ Headquarters/g, "Wardens’ headquarters");