diff --git a/go.mod b/go.mod
index 7773e4eb8..623d70b6e 100644
--- a/go.mod
+++ b/go.mod
@@ -16,7 +16,6 @@ require (
 	github.com/btcsuite/btcwallet/wtxmgr v1.5.0
 	github.com/coreos/go-systemd v0.0.0-20190719114852-fd7a80b32e1f
 	github.com/davecgh/go-spew v1.1.1
-	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1
 	github.com/dvyukov/go-fuzz v0.0.0-20210602112143-b1f3d6f4ef4e
 	github.com/go-errors/errors v1.0.1
 	github.com/golang/protobuf v1.5.2
@@ -76,6 +75,7 @@ require (
 	github.com/coreos/go-systemd/v22 v22.3.2 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/decred/dcrd/crypto/blake256 v1.0.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
 	github.com/decred/dcrd/lru v1.0.0 // indirect
 	github.com/dsnet/compress v0.0.1 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
diff --git a/input/script_utils.go b/input/script_utils.go
index 8302a972a..e12b57c43 100644
--- a/input/script_utils.go
+++ b/input/script_utils.go
@@ -9,7 +9,6 @@ import (
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
-	secp "github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"golang.org/x/crypto/ripemd160"
 )
 
@@ -1399,7 +1398,7 @@ func TweakPubKeyWithTweak(pubKey *btcec.PublicKey,
 		tweakJacobian  btcec.JacobianPoint
 		resultJacobian btcec.JacobianPoint
 	)
-	tweakKey := secp.PrivKeyFromBytes(tweakBytes)
+	tweakKey, _ := btcec.PrivKeyFromBytes(tweakBytes)
 	btcec.ScalarBaseMultNonConst(&tweakKey.Key, &tweakJacobian)
 
 	pubKey.AsJacobian(&pubKeyJacobian)
@@ -1549,5 +1548,6 @@ func DeriveRevocationPrivKey(revokeBasePriv *btcec.PrivateKey,
 // the key-ring and also to used as a tweak to derive new public+private keys
 // for the state.
 func ComputeCommitmentPoint(commitSecret []byte) *btcec.PublicKey {
-	return secp.PrivKeyFromBytes(commitSecret).PubKey()
+	_, pubKey := btcec.PrivKeyFromBytes(commitSecret)
+	return pubKey
 }
diff --git a/input/taproot.go b/input/taproot.go
index 255fba427..0319228ba 100644
--- a/input/taproot.go
+++ b/input/taproot.go
@@ -7,7 +7,17 @@ import (
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btcwallet/waddrmgr"
-	secp "github.com/decred/dcrd/dcrec/secp256k1/v4"
+)
+
+const (
+	// PubKeyFormatCompressedOdd is the identifier prefix byte for a public
+	// key whose Y coordinate is odd when serialized in the compressed
+	// format per section 2.3.4 of
+	// [SEC1](https://secg.org/sec1-v2.pdf#subsubsection.2.3.4).
+	// This is copied from the github.com/decred/dcrd/dcrec/secp256k1/v4 to
+	// avoid needing to directly reference (and by accident pull in
+	// incompatible crypto primitives) the package.
+	PubKeyFormatCompressedOdd byte = 0x03
 )
 
 // NewTxSigHashesV0Only returns a new txscript.TxSigHashes instance that will
@@ -56,7 +66,7 @@ func TapscriptFullTree(internalKey *btcec.PublicKey,
 	tapKey := txscript.ComputeTaprootOutputKey(internalKey, rootHash[:])
 
 	var outputKeyYIsOdd bool
-	if tapKey.SerializeCompressed()[0] == secp.PubKeyFormatCompressedOdd {
+	if tapKey.SerializeCompressed()[0] == PubKeyFormatCompressedOdd {
 		outputKeyYIsOdd = true
 	}
 
@@ -85,7 +95,7 @@ func TapscriptPartialReveal(internalKey *btcec.PublicKey,
 	rootHash := controlBlock.RootHash(revealedLeaf.Script)
 	tapKey := txscript.ComputeTaprootOutputKey(internalKey, rootHash)
 
-	if tapKey.SerializeCompressed()[0] == secp.PubKeyFormatCompressedOdd {
+	if tapKey.SerializeCompressed()[0] == PubKeyFormatCompressedOdd {
 		controlBlock.OutputKeyYIsOdd = true
 	}
 
diff --git a/lnwallet/rpcwallet/rpcwallet.go b/lnwallet/rpcwallet/rpcwallet.go
index b2c468705..de47a0759 100644
--- a/lnwallet/rpcwallet/rpcwallet.go
+++ b/lnwallet/rpcwallet/rpcwallet.go
@@ -22,7 +22,6 @@ import (
 	"github.com/btcsuite/btcd/wire"
 	"github.com/btcsuite/btcwallet/waddrmgr"
 	basewallet "github.com/btcsuite/btcwallet/wallet"
-	secp "github.com/decred/dcrd/dcrec/secp256k1/v4"
 	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/keychain"
 	"github.com/lightningnetwork/lnd/lncfg"
@@ -1057,7 +1056,7 @@ func (r *RPCKeyRing) remoteSign(tx *wire.MsgTx, signDesc *input.SignDescriptor,
 		// of this RPC), we can get by with faking certain information
 		// that we don't have.
 		fakeInternalKey, _ := btcec.ParsePubKey(d.PubKey)
-		fakeKeyIsOdd := d.PubKey[0] == secp.PubKeyFormatCompressedOdd
+		fakeKeyIsOdd := d.PubKey[0] == input.PubKeyFormatCompressedOdd
 		controlBlock := txscript.ControlBlock{
 			InternalKey:     fakeInternalKey,
 			OutputKeyYIsOdd: fakeKeyIsOdd,