diff --git a/src/pass.ts b/src/pass.ts
index 3c56d2f..f8afe59 100644
--- a/src/pass.ts
+++ b/src/pass.ts
@@ -19,6 +19,7 @@ interface QrCode {
     message: string;
     format: QrFormat;
     messageEncoding: Encoding;
+    altText: string;
 }
 
 interface SignData {
@@ -83,6 +84,7 @@ export class PassData {
             message: payload.rawData,
             format: QrFormat.PKBarcodeFormatQR,
             messageEncoding: Encoding.utf8,
+            altText: 'SCAN TO VERIFY',
         }
 
         // Create pass data
diff --git a/src/payload.ts b/src/payload.ts
index a86f586..6288a9c 100644
--- a/src/payload.ts
+++ b/src/payload.ts
@@ -339,6 +339,14 @@ export class Payload {
                 throw new Error('certificateType');
         }
 
+        data.backFields.push(...[
+            {
+                key: "credits",
+                label: "",
+                value: "Created with <a href='https://covidpass.marvinsextro.de'>CovidPass</a>"
+            }
+        ]);
+
         return data;
     }
 }
\ No newline at end of file