diff --git a/src/epub/css/core.css b/src/epub/css/core.css
index 0e62fd3..2414d5f 100644
--- a/src/epub/css/core.css
+++ b/src/epub/css/core.css
@@ -154,7 +154,7 @@ section > header + *{
 }
 
 a[epub|type~="noteref"]{
-	font-size: .75em;
+	font-size: smaller;
 	font-style: normal !important;
 	vertical-align: super;
 }
diff --git a/src/epub/css/se.css b/src/epub/css/se.css
index bdc1016..d5c51bb 100644
--- a/src/epub/css/se.css
+++ b/src/epub/css/se.css
@@ -43,7 +43,7 @@ section[epub|type~="imprint"] p{
 }
 
 section[epub|type~="imprint"] p{
-	font-size: .75em;
+	font-size: smaller;
 	text-align: justify;
 	width: 75%;
 }