diff --git a/bitcoin/examples/ecdsa-psbt.rs b/bitcoin/examples/ecdsa-psbt.rs
index 93631fcca..79aed0941 100644
--- a/bitcoin/examples/ecdsa-psbt.rs
+++ b/bitcoin/examples/ecdsa-psbt.rs
@@ -232,7 +232,7 @@ impl WatchOnly {
 
         let sigs: Vec<_> = psbt.inputs[0].partial_sigs.values().collect();
         let mut script_witness: Witness = Witness::new();
-        script_witness.push(&sigs[0].to_vec());
+        script_witness.push(sigs[0].serialize());
         script_witness.push(self.input_xpub.to_pub().to_bytes());
 
         psbt.inputs[0].final_script_witness = Some(script_witness);
diff --git a/bitcoin/tests/bip_174.rs b/bitcoin/tests/bip_174.rs
index 522360c65..76fa5b11f 100644
--- a/bitcoin/tests/bip_174.rs
+++ b/bitcoin/tests/bip_174.rs
@@ -452,8 +452,8 @@ fn finalize_psbt(mut psbt: Psbt) -> Psbt {
         let sigs: Vec<_> = psbt.inputs[1].partial_sigs.values().collect();
         let mut script_witness = Witness::new();
         script_witness.push([]); // Push 0x00 to the stack.
-        script_witness.push(&sigs[1].to_vec());
-        script_witness.push(&sigs[0].to_vec());
+        script_witness.push(sigs[1].serialize());
+        script_witness.push(sigs[0].serialize());
         script_witness.push(psbt.inputs[1].witness_script.clone().unwrap().as_bytes());
 
         script_witness