diff --git a/app/sass/_layout.scss b/app/sass/_layout.scss
index bac6ce3..d987efd 100644
--- a/app/sass/_layout.scss
+++ b/app/sass/_layout.scss
@@ -72,3 +72,8 @@ hr {
 code {
   @include font-mono;
 }
+
+sub,
+sup {
+  font-size: 0.8rem;
+}