diff --git a/payjoin-directory/src/lib.rs b/payjoin-directory/src/lib.rs
index 71caff21a..5c45802bb 100644
--- a/payjoin-directory/src/lib.rs
+++ b/payjoin-directory/src/lib.rs
@@ -21,7 +21,7 @@ const CHACHA20_POLY1305_NONCE_LEN: usize = 32; // chacha20poly1305 n_k
 const POLY1305_TAG_SIZE: usize = 16;
 pub const BHTTP_REQ_BYTES: usize =
     ENCAPSULATED_MESSAGE_BYTES - (CHACHA20_POLY1305_NONCE_LEN + POLY1305_TAG_SIZE);
-const V1_MAX_BUFFER_SIZE: usize = 65536;
+const V1_MAX_BUFFER_SIZE: usize = 7168;
 
 const V1_REJECT_RES_JSON: &str =
     r#"{{"errorCode": "original-psbt-rejected ", "message": "Body is not a string"}}"#;