diff --git a/imkey-core/ikc-proto/src/api.proto b/imkey-core/ikc-proto/src/api.proto
index 8933548d..a0120472 100644
--- a/imkey-core/ikc-proto/src/api.proto
+++ b/imkey-core/ikc-proto/src/api.proto
@@ -144,7 +144,7 @@ message DeriveSubAccountsResult {
 }
 
 message GetExtendedPublicKeysParam {
-    repeated PublicKeyDerivation derivations = 4;
+    repeated PublicKeyDerivation derivations = 1;
 }
 
 message GetExtendedPublicKeysResult {