diff --git a/waku/message/v1/message.proto b/waku/message/v1/message.proto
index b48b22e..292db84 100644
--- a/waku/message/v1/message.proto
+++ b/waku/message/v1/message.proto
@@ -10,4 +10,5 @@ message WakuMessage {
   optional sint64 timestamp = 10;
   optional bytes meta = 11;
   optional bool ephemeral = 31;
+  optional bytes rate_limit_proof = 21;
 }
diff --git a/waku/rln/v1/rln.proto b/waku/rln/v1/rln.proto
new file mode 100644
index 0000000..99fb517
--- /dev/null
+++ b/waku/rln/v1/rln.proto
@@ -0,0 +1,14 @@
+syntax = "proto3";
+
+// rfc: https://rfc.vac.dev/spec/17/
+package waku.rln.v1;
+
+message RateLimitProof {
+  bytes proof = 1;
+  bytes merkle_root = 2;
+  bytes epoch = 3;
+  bytes share_x = 4;
+  bytes share_y = 5;
+  bytes nullifier = 6;
+  bytes rln_identifier = 7;
+}
diff --git a/waku/store/v2beta4/store.proto b/waku/store/v2beta4/store.proto
index 46b1e7b..27f9c3c 100644
--- a/waku/store/v2beta4/store.proto
+++ b/waku/store/v2beta4/store.proto
@@ -37,7 +37,7 @@ message HistoryQuery {
 }
 
 message HistoryResponse {
-  // the first field is reserved for future use
+  // The first field is reserved for future use
   repeated waku.message.v1.WakuMessage messages = 2;
   PagingInfo paging_info = 3;
   enum Error {