diff --git a/historical-materialism.csl b/historical-materialism.csl
index 155c5b1746c..0d31db251cb 100644
--- a/historical-materialism.csl
+++ b/historical-materialism.csl
@@ -343,7 +343,7 @@
       </choose>
     </layout>
   </citation>
-  <bibliography subsequent-author-substitute="———">
+  <bibliography subsequent-author-substitute="&#8212;&#8212;&#8212;">
     <sort>
       <key macro="contributors"/>
       <key variable="issued"/>