diff --git a/client/src/styles/_typography.scss b/client/src/styles/_typography.scss
index 422fd540..eafc5a38 100644
--- a/client/src/styles/_typography.scss
+++ b/client/src/styles/_typography.scss
@@ -82,6 +82,20 @@ button {
   box-sizing: border-box;
 }
 
+sup,
+sub {
+  font-size: toRem(14px);
+  line-height: normal;
+}
+
+sup {
+  vertical-align: super;
+}
+
+sub {
+  vertical-align: sub;
+}
+
 .small-emph {
   font-size: toRem($base-font-size-pixels);
   margin-bottom: 7.5px;
diff --git a/server/core/constants.py b/server/core/constants.py
index 17f1f882..2dec2061 100644
--- a/server/core/constants.py
+++ b/server/core/constants.py
@@ -1,2 +1,2 @@
-DEFAULT_RICH_TEXT_FEATURES = ['ul', 'bold']
-INSTRUMENTS_RICH_TEXT_FEATURES = ['bold', 'ul', 'brand', 'secondary']
+DEFAULT_RICH_TEXT_FEATURES = ["ul", "bold", "subscript", "superscript"]
+INSTRUMENTS_RICH_TEXT_FEATURES = DEFAULT_RICH_TEXT_FEATURES + ["brand", "secondary"]