diff --git a/CHANGELOG.md b/CHANGELOG.md
index 015e5fb..b1800bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 - Add an optional "Real WPM" indicator beneath the WPM control (computed from the last 60 seconds of reading)
 - Pause "Real WPM" updates while paused, add an adaptive timing toggle, and make the WPM setting reflect actual reading throughput
+- Add `Shift+↑/↓` shortcuts for adjusting WPM by 100 and document them in the shortcuts modal
 
 ### 2026-02-07: 1.1.0
 
diff --git a/src/components/modals/ShortcutsModal.tsx b/src/components/modals/ShortcutsModal.tsx
index 743345e..213114d 100644
--- a/src/components/modals/ShortcutsModal.tsx
+++ b/src/components/modals/ShortcutsModal.tsx
@@ -52,11 +52,19 @@ export function ShortcutsModal({ onClose }: Props) {
             </div>
             <div style={styles.shortcutRow}>
               <kbd style={styles.kbdLarge}>↑</kbd>
-              <span>Increase speed</span>
+              <span>Increase speed (25 WPM)</span>
             </div>
             <div style={styles.shortcutRow}>
               <kbd style={styles.kbdLarge}>↓</kbd>
-              <span>Decrease speed</span>
+              <span>Decrease speed (25 WPM)</span>
+            </div>
+            <div style={styles.shortcutRow}>
+              <kbd style={styles.kbdLarge}>Shift + ↑</kbd>
+              <span>Increase speed (100 WPM)</span>
+            </div>
+            <div style={styles.shortcutRow}>
+              <kbd style={styles.kbdLarge}>Shift + ↓</kbd>
+              <span>Decrease speed (100 WPM)</span>
             </div>
             <div style={styles.shortcutRow}>
               <kbd style={styles.kbdLarge}>R</kbd>
@@ -72,4 +80,3 @@ export function ShortcutsModal({ onClose }: Props) {
     </div>
   );
 }
-