diff --git a/lib/index.d.ts b/lib/index.d.ts
index 821e0f59c7..6e87b90f12 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -66,9 +66,9 @@ interface ImportOptions {
 export namespace JWK {
 
     interface pemEncodingOptions {
-      type?: string
-      cipher?: string
-      passphrase?: string
+        type?: string
+        cipher?: string
+        passphrase?: string
     }
 
     class Key {