diff --git a/code/ui/blocks/src/components/Typeset.tsx b/code/ui/blocks/src/components/Typeset.tsx
index 8fbfca58b56..76b70c99885 100644
--- a/code/ui/blocks/src/components/Typeset.tsx
+++ b/code/ui/blocks/src/components/Typeset.tsx
@@ -35,7 +35,7 @@ const Wrapper = styled.div(withReset, ({ theme }) => ({
 
 export interface TypesetProps {
   fontFamily?: string;
-  fontSizes: string[];
+  fontSizes: (string | number)[];
   fontWeight?: number;
   sampleText?: string;
 }
diff --git a/docs/api/doc-block-typeset.md b/docs/api/doc-block-typeset.md
index 22933dc5f52..047657cd89f 100644
--- a/docs/api/doc-block-typeset.md
+++ b/docs/api/doc-block-typeset.md
@@ -84,7 +84,7 @@ Provides a font family to be displayed.
 
 ### `fontSizes`
 
-Type: `number[]`
+Type: `(string | number)[]`
 
 Provides a list of available font sizes (in `px`).