diff --git a/packages/keystrokes/src/keystrokes.ts b/packages/keystrokes/src/keystrokes.ts
index 2be325c..43b2155 100644
--- a/packages/keystrokes/src/keystrokes.ts
+++ b/packages/keystrokes/src/keystrokes.ts
@@ -234,6 +234,7 @@ export class Keystrokes<
   }
 
   checkKey(key: string) {
+    key = key.toLowerCase()
     return this._activeKeyPresses.some(
       (p) => p.key === key || p.aliases.has(key),
     )
diff --git a/packages/keystrokes/src/tests/keystrokes.spec.ts b/packages/keystrokes/src/tests/keystrokes.spec.ts
index 0bb9c10..b26761e 100644
--- a/packages/keystrokes/src/tests/keystrokes.spec.ts
+++ b/packages/keystrokes/src/tests/keystrokes.spec.ts
@@ -591,15 +591,20 @@ describe('new Keystrokes(options)', () => {
       const keystrokes = createTestKeystrokes()
 
       expect(keystrokes.checkKey('a')).toBe(false)
+      expect(keystrokes.checkKey('ArrowRight')).toBe(false)
 
       keystrokes.press({ key: 'a' })
       keystrokes.press({ key: 'a' })
+      keystrokes.press({ key: 'ArrowRight' })
 
       expect(keystrokes.checkKey('a')).toBe(true)
+      expect(keystrokes.checkKey('ArrowRight')).toBe(true)
 
       keystrokes.release({ key: 'a' })
+      keystrokes.release({ key: 'ArrowRight' })
 
       expect(keystrokes.checkKey('a')).toBe(false)
+      expect(keystrokes.checkKey('ArrowRight')).toBe(false)
     })
 
     it('will return a boolean indicating if a key is pressed when using aliases', () => {