diff --git a/aimenet-web/lib/aime-card.ts b/aimenet-web/lib/aime-card.ts
index 0e24ba6..9993aa3 100644
--- a/aimenet-web/lib/aime-card.ts
+++ b/aimenet-web/lib/aime-card.ts
@@ -1,3 +1,5 @@
+export const CARD_ID_REGEX = /^(?:[0-9]{4} ?){5}$/i;
+
 /**
  * Generates a random Aime card id.
  */
@@ -16,5 +18,5 @@ export function generateAimeCardId(): string {
  * @param id The card id to validate
  */
 export function validateAimeCardId(id: string): boolean {
-    return id[0] !== '3' && /^[0-9A-F]{20}$/i.test(id);
+    return id[0] !== '3' && CARD_ID_REGEX.test(id);
 }
\ No newline at end of file