diff --git a/60.md b/60.md
index 2f248410..64cd282a 100644
--- a/60.md
+++ b/60.md
@@ -159,7 +159,7 @@ Her client:
         "proofs": [
             { "id": "1", "amount": 1 },
             { "id": "2", "amount": 2 },
-            { "id": "8", "amount": 8 },
+            { "id": "4", "amount": 8 },
         ]
     }),
     "tags": [