diff --git a/src/App.tsx b/src/App.tsx
index dbc0159..d2ed172 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -450,11 +450,11 @@ export default function App() {
           break;
         case "ArrowUp":
           e.preventDefault();
-          adjustWpm(25);
+          adjustWpm(e.shiftKey ? 100 : 25);
           break;
         case "ArrowDown":
           e.preventDefault();
-          adjustWpm(-25);
+          adjustWpm(e.shiftKey ? -100 : -25);
           break;
         case "r":
         case "R":