diff --git a/app/utils/user-validation.ts b/app/utils/user-validation.ts
index 0efe657..8613802 100644
--- a/app/utils/user-validation.ts
+++ b/app/utils/user-validation.ts
@@ -23,6 +23,7 @@ export const emailSchema = z
 	.email({ message: 'Email is invalid' })
 	.min(3, { message: 'Email is too short' })
 	.max(100, { message: 'Email is too long' })
+	.transform(email => email.toLowerCase())
 
 export const phoneSchema = z
 	.string()
diff --git a/tests/e2e/onboarding.test.ts b/tests/e2e/onboarding.test.ts
index ac50f1e..ed73e34 100644
--- a/tests/e2e/onboarding.test.ts
+++ b/tests/e2e/onboarding.test.ts
@@ -114,7 +114,7 @@ test('onboarding with a short code', async ({ page }) => {
 		name: `${firstName} ${lastName}`,
 		username,
 		phone,
-		email: `${username}@example.com`,
+		email: `${username}@example.com`.toLowerCase(),
 		password: faker.internet.password(),
 	}