diff --git a/lib/convert-worker.js b/lib/convert-worker.js
index 1f622c1..a2a38ac 100644
--- a/lib/convert-worker.js
+++ b/lib/convert-worker.js
@@ -403,7 +403,7 @@ function fixPossessives(xml) {
   // Note: if the "s" is unvoiced, as in Marquis, then it doesn't get the second "s".
   xml = xml.replace(
     // eslint-disable-next-line max-len
-    /(?<!‘)(Judas|Brutus|Jess|Aegis|Dauntless|Circus|Sirius|Brooks|Genesis|Atlas|Lucas|Gwerrus|Chris|Eligos|Animos|Mags|Huntress|Hephaestus|Lord of Loss|John Combs|Mama Mathers|Monokeros|Goddess|Boundless|Paris|Tress|Harris|Antares|Nieves|Backwoods|Midas|Mrs. Sims|Ms. Stillons|Chuckles|Amias)’(?!s)/g,
+    /(?<!‘)(Judas|Brutus|Jess|Aegis|Dauntless|Circus|Sirius|Brooks|Genesis|Atlas|Lucas|Gwerrus|Chris|Eligos|Animos|Mags|Huntress|Hephaestus|Lord of Loss|John Combs|Mama Mathers|Monokeros|Goddess|Boundless|Paris|Tress|Harris|Antares|Nieves|Backwoods|Midas|Mrs. Sims|Ms. Stillons|Chuckles|Amias|Semiramis)’(?!s)/g,
     "$1’s"
   );