diff --git a/v2/proto/claim.proto b/v2/proto/claim.proto
index db4efb5..0ba7a6c 100644
--- a/v2/proto/claim.proto
+++ b/v2/proto/claim.proto
@@ -75,5 +75,5 @@ message Video {
 }
 
 message Audio {
-    uint32 duration = 3;
+    uint32 duration = 1;
 }