diff --git a/types.ts b/types.ts
index b90965d..96a3861 100644
--- a/types.ts
+++ b/types.ts
@@ -27,4 +27,5 @@ export type Posix = {
 	shell: string
 }
 
-export type Base64String = string
+export type Base64String = `${string}`
+export type UrlString = `${string}`