diff --git a/themes/5ePhb.style.less b/themes/5ePhb.style.less
index 562362fd2..e9e404d13 100644
--- a/themes/5ePhb.style.less
+++ b/themes/5ePhb.style.less
@@ -512,7 +512,7 @@ body {
 		background-color : #faf7ea;
 		border-radius    : 4px;
 		white-space      : pre-wrap;
-		word-break       : break-word;
+		overflow-wrap    : break-word;
 	}
 
 	pre code{