use util::ser::{Readable, Writeable, Writer, WriterWriteAdaptor};
use util::byte_utils;
-use secp256k1::key::{SecretKey, PublicKey};
-use secp256k1::{Secp256k1, Signature};
-use secp256k1;
+use bitcoin::secp256k1::key::{SecretKey, PublicKey};
+use bitcoin::secp256k1::{Secp256k1, Signature};
+use bitcoin::secp256k1;
use std::{cmp, mem};