diff --git a/bitcoin/Cargo.toml b/bitcoin/Cargo.toml
index 6aebc3f637..10e3a51941 100644
--- a/bitcoin/Cargo.toml
+++ b/bitcoin/Cargo.toml
@@ -16,7 +16,7 @@ exclude = ["tests", "contrib"]
 [features]
 default = [ "std", "secp-recovery" ]
 std = ["base58/std", "bech32/std", "hashes/std", "hex/std", "internals/std", "io/std", "secp256k1/std", "units/std"]
-rand-std = ["secp256k1/rand-std", "std"]
+rand-std = ["secp256k1/std", "secp256k1/rand", "std"]
 rand = ["secp256k1/rand"]
 serde = ["actual-serde", "hashes/serde", "secp256k1/serde", "internals/serde", "units/serde"]
 secp-lowmemory = ["secp256k1/lowmemory"]
@@ -35,7 +35,7 @@ hex = { package = "hex-conservative", version = "0.2.0", default-features = fals
 hex_lit = "0.1.1"
 internals = { package = "bitcoin-internals", version = "0.3.0", features = ["alloc"] }
 io = { package = "bitcoin-io", version = "0.1.1", default-features = false, features = ["alloc"] }
-secp256k1 = { version = "0.29.0", default-features = false, features = ["hashes", "alloc"] }
+secp256k1 = { git = "https://github.com/rust-bitcoin/rust-secp256k1.git", rev = "refs/pull/721/head", default-features = false, features = ["alloc", "hashes", "rand", "std"] }
 units = { package = "bitcoin-units", version = "0.1.0", default-features = false, features = ["alloc"] }
 
 base64 = { version = "0.21.3", optional = true }
diff --git a/bitcoin/src/psbt/mod.rs b/bitcoin/src/psbt/mod.rs
index 3d428fdac9..46152bd2a0 100644
--- a/bitcoin/src/psbt/mod.rs
+++ b/bitcoin/src/psbt/mod.rs
@@ -28,7 +28,9 @@ use crate::crypto::{ecdsa, taproot};
 use crate::key::{TapTweak, XOnlyPublicKey};
 use crate::prelude::*;
 use crate::sighash::{self, EcdsaSighashType, Prevouts, SighashCache};
-use crate::{Amount, FeeRate, TapLeafHash, TapSighashType};
+use crate::{Amount, FeeRate, TapLeafHash, TapSighash, TapSighashType};
+
+use crate::hashes::Hash;
 
 #[rustfmt::skip]                // Keep public re-exports separate.
 #[doc(inline)]
@@ -444,6 +446,8 @@ impl Psbt {
                         .tap_tweak(secp, input.tap_merkle_root)
                         .to_inner();
 
+                    let msg = msg.to_byte_array();
+
                     #[cfg(feature = "rand-std")]
                     let signature = secp.sign_schnorr(&msg, &key_pair);
                     #[cfg(not(feature = "rand-std"))]
@@ -471,6 +475,8 @@ impl Psbt {
                         let (msg, sighash_type) =
                             self.sighash_taproot(input_index, cache, Some(lh))?;
 
+                        let msg = msg.to_byte_array();
+
                         #[cfg(feature = "rand-std")]
                         let signature = secp.sign_schnorr(&msg, &key_pair);
                         #[cfg(not(feature = "rand-std"))]
@@ -561,7 +567,7 @@ impl Psbt {
         input_index: usize,
         cache: &mut SighashCache<T>,
         leaf_hash: Option<TapLeafHash>,
-    ) -> Result<(Message, TapSighashType), SignError> {
+    ) -> Result<(TapSighash, TapSighashType), SignError> {
         use OutputType::*;
 
         if self.signing_algorithm(input_index)? != SigningAlgorithm::Schnorr {
@@ -606,7 +612,7 @@ impl Psbt {
                 } else {
                     cache.taproot_key_spend_signature_hash(input_index, &prev_outs, hash_ty)?
                 };
-                Ok((Message::from(sighash), hash_ty))
+                Ok((sighash, hash_ty))
             }
             _ => Err(SignError::Unsupported),
         }