diff --git a/se/data/templates/core.css b/se/data/templates/core.css
index 0e62fd30..2414d5f9 100644
--- a/se/data/templates/core.css
+++ b/se/data/templates/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/tests/data/draftbook/jane-austen_draft-novel/src/epub/css/core.css b/tests/data/draftbook/jane-austen_draft-novel/src/epub/css/core.css
index 0e62fd30..2414d5f9 100644
--- a/tests/data/draftbook/jane-austen_draft-novel/src/epub/css/core.css
+++ b/tests/data/draftbook/jane-austen_draft-novel/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/tests/data/testbook/jane-austen_test-novel/src/epub/css/core.css b/tests/data/testbook/jane-austen_test-novel/src/epub/css/core.css
index 0e62fd30..2414d5f9 100644
--- a/tests/data/testbook/jane-austen_test-novel/src/epub/css/core.css
+++ b/tests/data/testbook/jane-austen_test-novel/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;
 }