diff --git a/experimental-biology-and-medicine.csl b/experimental-biology-and-medicine.csl
index 49b04ed92d5..c59d539cfa3 100644
--- a/experimental-biology-and-medicine.csl
+++ b/experimental-biology-and-medicine.csl
@@ -186,7 +186,7 @@
               </choose>
             </group>
             <group delimiter=": ">
-              <text variable="volume"/>
+              <text variable="volume" font-weight="bold"/>
               <text variable="page"/>
             </group>
           </group>