diff --git a/readme.md b/readme.md
index 227ced3..449d838 100644
--- a/readme.md
+++ b/readme.md
@@ -27,7 +27,7 @@ This app:
  1. if ok, render items in a list. if error, render error span at the bottom of the page.
 
 <details>
-<summary>React (click to expand)</summary>
+<summary><b>React (click to expand)</b></summary>
 
 ```typescript
 type Item = {id: string, title: string, description: string}
@@ -63,7 +63,7 @@ export const App: () => React.Node = () => {
 </details>
 
 <details>
-<summary>Purescript Halogen (click to expand)</summary>
+<summary><b>Purescript Halogen (click to expand)</b></summary>
 
 ```haskell
 type Item = { id :: String, title :: String, description :: String }