diff --git a/protocols/v2/sv2-ffi/sv2.h b/protocols/v2/sv2-ffi/sv2.h
index dd39818219..3e22d94ed3 100644
--- a/protocols/v2/sv2-ffi/sv2.h
+++ b/protocols/v2/sv2-ffi/sv2.h
@@ -22,9 +22,9 @@ static const uintptr_t NOISE_FRAME_HEADER_SIZE = 2;
 
 static const uintptr_t NOISE_FRAME_HEADER_LEN_OFFSET = 0;
 
-static const uintptr_t INITIATOR_EXPECTED_HANDSHAKE_MESSAGE_LENGTH = 170;
+static const uintptr_t INITIATOR_EXPECTED_HANDSHAKE_MESSAGE_LENGTH = 234;
 
-static const uintptr_t RESPONDER_EXPECTED_HANDSHAKE_MESSAGE_LENGTH = 32;
+static const uintptr_t RESPONDER_EXPECTED_HANDSHAKE_MESSAGE_LENGTH = 64;
 
 static const uint8_t SV2_MINING_PROTOCOL_DISCRIMINANT = 0;