diff --git a/package.json b/package.json
index 65834fe482..07d0508a34 100644
--- a/package.json
+++ b/package.json
@@ -96,6 +96,7 @@
     "elliptic": "6.5.4",
     "hash.js": "1.1.7",
     "js-sha3": "0.5.7",
+    "noble-secp256k1": "^1.2.8",
     "scrypt-js": "3.0.1",
     "solc": "0.7.1",
     "tiny-inflate": "1.0.3",
diff --git a/packages/signing-key/package.json b/packages/signing-key/package.json
index 372f89f4b5..99764e0315 100644
--- a/packages/signing-key/package.json
+++ b/packages/signing-key/package.json
@@ -7,9 +7,11 @@
     "@ethersproject/bytes": "^5.4.0",
     "@ethersproject/logger": "^5.4.0",
     "@ethersproject/properties": "^5.4.0",
+    "@ethersproject/sha2": "^5.4.0",
     "bn.js": "^4.11.9",
     "elliptic": "6.5.4",
-    "hash.js": "1.1.7"
+    "hash.js": "1.1.7",
+    "noble-secp256k1": "^1.2.8"
   },
   "description": "Elliptic curve library functions for the secp256k1 curve.",
   "ethereum": "donations.ethers.eth",
diff --git a/packages/signing-key/src.ts/index.ts b/packages/signing-key/src.ts/index.ts
index 7c4cca8389..f033c06cfa 100644
--- a/packages/signing-key/src.ts/index.ts
+++ b/packages/signing-key/src.ts/index.ts
@@ -1,7 +1,6 @@
 "use strict";
-
-import { EC } from "./elliptic";
-
+import * as secp256k1 from "noble-secp256k1";
+import { computeHmac, SupportedAlgorithm } from "@ethersproject/sha2";
 import { arrayify, BytesLike, hexlify, hexZeroPad, Signature, SignatureLike, splitSignature } from "@ethersproject/bytes";
 import { defineReadOnly } from "@ethersproject/properties";
 
@@ -9,63 +8,51 @@ import { Logger } from "@ethersproject/logger";
 import { version } from "./_version";
 const logger = new Logger(version);
 
-let _curve: EC = null
-function getCurve() {
-    if (!_curve) {
-        _curve = new EC("secp256k1");
-    }
-    return _curve;
+// @ts-ignore
+secp256k1.utils.hmacSha256 = function(key: Uint8Array, ...messages: Uint8Array[]): Uint8Array {
+    return arrayify(computeHmac(SupportedAlgorithm.sha256, key, Buffer.concat(messages)));
 }
 
 export class SigningKey {
-
     readonly curve: string;
-
     readonly privateKey: string;
     readonly publicKey: string;
     readonly compressedPublicKey: string;
-
-    //readonly address: string;
-
     readonly _isSigningKey: boolean;
 
     constructor(privateKey: BytesLike) {
         defineReadOnly(this, "curve", "secp256k1");
-
         defineReadOnly(this, "privateKey", hexlify(privateKey));
-
-        const keyPair = getCurve().keyFromPrivate(arrayify(this.privateKey));
-
-        defineReadOnly(this, "publicKey", "0x" + keyPair.getPublic(false, "hex"));
-        defineReadOnly(this, "compressedPublicKey", "0x" + keyPair.getPublic(true, "hex"));
-
+        const bytes = arrayify(this.privateKey);
+        defineReadOnly(this, "publicKey", "0x" + secp256k1.getPublicKey(bytes, false));
+        defineReadOnly(this, "compressedPublicKey", "0x" + secp256k1.getPublicKey(bytes, true));
         defineReadOnly(this, "_isSigningKey", true);
     }
 
     _addPoint(other: BytesLike): string {
-        const p0 =  getCurve().keyFromPublic(arrayify(this.publicKey));
-        const p1 =  getCurve().keyFromPublic(arrayify(other));
-        return "0x" + p0.pub.add(p1.pub).encodeCompressed("hex");
+        const p0 =  secp256k1.Point.fromHex(arrayify(this.publicKey));
+        const p1 =  secp256k1.Point.fromHex(arrayify(other));
+        return "0x" + p0.add(p1).toHex(true);
     }
 
     signDigest(digest: BytesLike): Signature {
-        const keyPair = getCurve().keyFromPrivate(arrayify(this.privateKey));
         const digestBytes = arrayify(digest);
         if (digestBytes.length !== 32) {
             logger.throwArgumentError("bad digest length", "digest", digest);
         }
-        const signature = keyPair.sign(digestBytes, { canonical: true });
+        const [sigBytes, recoveryParam] = secp256k1._syncSign(
+            digestBytes, arrayify(this.privateKey), {canonical: true, recovered: true}
+        );
+        const {r, s} = secp256k1.Signature.fromHex(sigBytes);
         return splitSignature({
-            recoveryParam: signature.recoveryParam,
-            r: hexZeroPad("0x" + signature.r.toString(16), 32),
-            s: hexZeroPad("0x" + signature.s.toString(16), 32),
+            recoveryParam: recoveryParam,
+            r: hexZeroPad("0x" + r.toString(16), 32),
+            s: hexZeroPad("0x" + s.toString(16), 32),
         })
     }
 
     computeSharedSecret(otherKey: BytesLike): string {
-        const keyPair = getCurve().keyFromPrivate(arrayify(this.privateKey));
-        const otherKeyPair = getCurve().keyFromPublic(arrayify(computePublicKey(otherKey)));
-        return hexZeroPad("0x" + keyPair.derive(otherKeyPair.getPublic()).toString(16), 32);
+        return "0x" + secp256k1.getSharedSecret(arrayify(this.privateKey), arrayify(computePublicKey(otherKey)));
     }
 
     static isSigningKey(value: any): value is SigningKey {
@@ -75,8 +62,8 @@ export class SigningKey {
 
 export function recoverPublicKey(digest: BytesLike, signature: SignatureLike): string {
     const sig = splitSignature(signature);
-    const rs = { r: arrayify(sig.r), s: arrayify(sig.s) };
-    return "0x" + getCurve().recoverPubKey(arrayify(digest), rs, sig.recoveryParam).encode("hex", false);
+    const rs = new secp256k1.Signature(BigInt(sig.r), BigInt(sig.s));
+    return "0x" + secp256k1.recoverPublicKey(hexlify(digest), rs.toHex(), sig.recoveryParam);
 }
 
 export function computePublicKey(key: BytesLike, compressed?: boolean): string {
@@ -85,17 +72,15 @@ export function computePublicKey(key: BytesLike, compressed?: boolean): string {
     if (bytes.length === 32) {
         const signingKey = new SigningKey(bytes);
         if (compressed) {
-            return "0x" + getCurve().keyFromPrivate(bytes).getPublic(true, "hex");
+            return "0x" + secp256k1.getPublicKey(bytes, true);
         }
         return signingKey.publicKey;
-
     } else if (bytes.length === 33) {
         if (compressed) { return hexlify(bytes); }
-        return "0x" + getCurve().keyFromPublic(bytes).getPublic(false, "hex");
-
+        return "0x" + secp256k1.getPublicKey(bytes, false);
     } else if (bytes.length === 65) {
         if (!compressed) { return hexlify(bytes); }
-        return "0x" + getCurve().keyFromPublic(bytes).getPublic(true, "hex");
+        return "0x" + secp256k1.getPublicKey(bytes, true);
     }
 
     return logger.throwArgumentError("invalid public or private key", "key", "[REDACTED]");