diff --git a/packages/x-client/package.json b/packages/x-client/package.json
index c9340e6e00..323dc0b589 100644
--- a/packages/x-client/package.json
+++ b/packages/x-client/package.json
@@ -12,7 +12,6 @@
     "@ethersproject/strings": "^5.7.0",
     "@ethersproject/wallet": "^5.7.0",
     "@imtbl/config": "0.0.0",
-    "@imtbl/core-sdk": "^2.7.0",
     "@imtbl/generated-clients": "0.0.0",
     "axios": "^1.6.5",
     "bn.js": "^5.2.1",
@@ -24,7 +23,6 @@
   "devDependencies": {
     "@rollup/plugin-typescript": "^11.0.0",
     "@swc/jest": "^0.2.24",
-    "@types/elliptic": "^6.4.18",
     "@types/jest": "^29.4.3",
     "eslint": "^8.40.0",
     "jest": "^29.4.3",
diff --git a/packages/x-client/src/exportUtils.ts b/packages/x-client/src/exportUtils.ts
index f50d5465b6..f82c4ee9ca 100644
--- a/packages/x-client/src/exportUtils.ts
+++ b/packages/x-client/src/exportUtils.ts
@@ -2,4 +2,4 @@ export {
   generateLegacyStarkPrivateKey,
   generateStarkPrivateKey,
   createStarkSigner,
-} from '@imtbl/core-sdk';
+} from './utils';
diff --git a/packages/x-client/src/utils/index.ts b/packages/x-client/src/utils/index.ts
index 3ef356d579..d3d802a898 100644
--- a/packages/x-client/src/utils/index.ts
+++ b/packages/x-client/src/utils/index.ts
@@ -1,5 +1,5 @@
 export * from './convertToSignableToken';
 export * from './formatError';
 export * from './crypto';
-// export * from './stark/starkCurve';
-// export * from './stark/starkSigner';
+export * from './stark/starkCurve';
+export * from './stark/starkSigner';
diff --git a/packages/x-client/src/utils/stark/legacy/crypto/constants.ts b/packages/x-client/src/utils/stark/legacy/crypto/constants.ts
index 793f02d75c..73fc31b236 100644
--- a/packages/x-client/src/utils/stark/legacy/crypto/constants.ts
+++ b/packages/x-client/src/utils/stark/legacy/crypto/constants.ts
@@ -1,6 +1,7 @@
 // eslint-disable-next-line @typescript-eslint/naming-convention
 import BN from 'bn.js';
-import { curves, ec as Ec } from 'elliptic';
+// @ts-ignore
+import elliptic from 'elliptic';
 import hashJS from 'hash.js';
 
 import { constantPointsHex } from './points';
@@ -25,8 +26,9 @@ const order = new BN(
   16,
 );
 
-const starkEc = new Ec(
-  new curves.PresetCurve({
+// eslint-disable-next-line new-cap
+const starkEc = new elliptic.ec(
+  new elliptic.curves.PresetCurve({
     type: 'short',
     prime: null,
     p: prime as any,
diff --git a/packages/x-client/src/utils/stark/legacy/crypto/crypto.ts b/packages/x-client/src/utils/stark/legacy/crypto/crypto.ts
index 2e93a86108..239b6383d9 100644
--- a/packages/x-client/src/utils/stark/legacy/crypto/crypto.ts
+++ b/packages/x-client/src/utils/stark/legacy/crypto/crypto.ts
@@ -4,9 +4,11 @@
 import assert from 'assert';
 // eslint-disable-next-line @typescript-eslint/naming-convention
 import BN from 'bn.js';
-import { ec } from 'elliptic';
+// @ts-ignore
+import elliptic from 'elliptic';
 import * as encUtils from 'enc-utils';
-import { hdkey } from 'ethereumjs-wallet';
+// import { hdkey } from 'ethereumjs-wallet';
+import * as ethereumJsWallet from 'ethereumjs-wallet';
 import hashJS from 'hash.js';
 
 import {
@@ -81,37 +83,37 @@ export function grindKey(privateKey: string): string {
   return key.mod(ORDER).toString('hex');
 }
 
-export function getKeyPair(privateKey: string): ec.KeyPair {
+export function getKeyPair(privateKey: string): elliptic.ec.KeyPair {
   return starkEc.keyFromPrivate(privateKey, 'hex');
 }
 
 export function getPrivateKeyFromPath(seed: string, path: string): string {
-  return hdkey
+  return ethereumJsWallet.hdkey
     .fromMasterSeed(Buffer.from(seed.slice(2), 'hex')) // assuming seed is '0x...'
     .derivePath(path)
     .getWallet()
     .getPrivateKeyString();
 }
 
-export function getKeyPairFromPath(seed: string, path: string): ec.KeyPair {
+export function getKeyPairFromPath(seed: string, path: string): elliptic.ec.KeyPair {
   assert(isHexPrefixed(seed), MISSING_HEX_PREFIX);
   const privateKey = getPrivateKeyFromPath(seed, path);
   return getKeyPair(grindKey(privateKey));
 }
 
-export function getPublic(keyPair: ec.KeyPair, compressed = false): string {
+export function getPublic(keyPair: elliptic.ec.KeyPair, compressed = false): string {
   return keyPair.getPublic(compressed, 'hex');
 }
 
-export function getStarkPublicKey(keyPair: ec.KeyPair): string {
+export function getStarkPublicKey(keyPair: elliptic.ec.KeyPair): string {
   return getPublic(keyPair, true);
 }
 
-export function getKeyPairFromPublicKey(publicKey: string): ec.KeyPair {
+export function getKeyPairFromPublicKey(publicKey: string): elliptic.ec.KeyPair {
   return starkEc.keyFromPublic(encUtils.hexToArray(publicKey));
 }
 
-export function getKeyPairFromPrivateKey(privateKey: string): ec.KeyPair {
+export function getKeyPairFromPrivateKey(privateKey: string): elliptic.ec.KeyPair {
   return starkEc.keyFromPrivate(privateKey, 'hex');
 }
 
diff --git a/packages/x-client/src/utils/stark/starkCurve.ts b/packages/x-client/src/utils/stark/starkCurve.ts
index 1169a08b35..7255713b53 100644
--- a/packages/x-client/src/utils/stark/starkCurve.ts
+++ b/packages/x-client/src/utils/stark/starkCurve.ts
@@ -2,15 +2,19 @@
 import { Signer } from '@ethersproject/abstract-signer';
 import { splitSignature } from '@ethersproject/bytes';
 import hash from 'hash.js';
-import { curves, ec } from 'elliptic';
+// @ts-ignore - elliptic types cause build to break...
+import elliptic from 'elliptic';
 import * as encUtils from 'enc-utils';
 // eslint-disable-next-line @typescript-eslint/naming-convention
 import BN from 'bn.js';
-import { hdkey } from 'ethereumjs-wallet';
+// import { hdkey } from 'ethereumjs-wallet';
+import * as ethereumJsWallet from 'ethereumjs-wallet';
 import { createStarkSigner } from './starkSigner';
 import * as legacy from './legacy/crypto';
 import { getStarkPublicKeyFromImx } from './getStarkPublicKeyFromImx';
 
+const { curves, ec } = elliptic;
+
 /*
 Stark-friendly elliptic curve
 
@@ -154,7 +158,7 @@ export function checkIfHashedKeyIsAboveLimit(keySeed: BN) {
 }
 
 export function getPrivateKeyFromPath(seed: string, path: string): BN {
-  const privateKey = hdkey
+  const privateKey = ethereumJsWallet.hdkey
     .fromMasterSeed(Buffer.from(seed.slice(2), 'hex')) // assuming seed is '0x...'
     .derivePath(path)
     .getWallet()
diff --git a/packages/x-client/src/utils/stark/starkSigner.ts b/packages/x-client/src/utils/stark/starkSigner.ts
index feea1364cf..6674db2678 100644
--- a/packages/x-client/src/utils/stark/starkSigner.ts
+++ b/packages/x-client/src/utils/stark/starkSigner.ts
@@ -1,4 +1,5 @@
-import { ec } from 'elliptic';
+// @ts-ignore
+import elliptic from 'elliptic';
 import * as encUtils from 'enc-utils';
 // eslint-disable-next-line @typescript-eslint/naming-convention
 import BN from 'bn.js';
@@ -7,7 +8,7 @@ import { starkEc } from './legacy/crypto';
 import { Errors } from './errors';
 
 export class StandardStarkSigner implements StarkSigner {
-  private keyPair: ec.KeyPair;
+  private keyPair: elliptic.ec.KeyPair;
 
   constructor(private privateKey: string) {
     this.keyPair = starkEc.keyFromPrivate(privateKey, 'hex');
@@ -23,7 +24,7 @@ export class StandardStarkSigner implements StarkSigner {
   }
 
   // eslint-disable-next-line class-methods-use-this
-  private serialize(sig: ec.Signature): string {
+  private serialize(sig: elliptic.ec.Signature): string {
     return encUtils.addHexPrefix(
       encUtils.padLeft(sig.r.toString('hex'), 64)
         + encUtils.padLeft(sig.s.toString('hex'), 64),
diff --git a/packages/x-client/tsconfig.json b/packages/x-client/tsconfig.json
index ab5a7f300c..15fcf40c38 100644
--- a/packages/x-client/tsconfig.json
+++ b/packages/x-client/tsconfig.json
@@ -18,5 +18,5 @@
     "skipLibCheck": true
   },
   "include": ["src"],
-  "exclude": ["node_modules", "dist"]
+  "exclude": ["node_modules", "dist", "node_modules/elliptic"]
 }
diff --git a/sdk/package.json b/sdk/package.json
index fb36c0ebd2..2ce91c0a01 100644
--- a/sdk/package.json
+++ b/sdk/package.json
@@ -16,7 +16,6 @@
     "@ethersproject/providers": "^5.7.2",
     "@ethersproject/strings": "^5.7.0",
     "@ethersproject/wallet": "^5.7.0",
-    "@imtbl/core-sdk": "^2.7.0",
     "@imtbl/react-analytics": "0.2.1-alpha",
     "@jest/globals": "^29.5.0",
     "@magic-ext/oidc": "4.2.0",
diff --git a/sdk/rollup.config.js b/sdk/rollup.config.js
index e3e14cfbb9..ca21a67786 100644
--- a/sdk/rollup.config.js
+++ b/sdk/rollup.config.js
@@ -11,7 +11,6 @@ import terser from '@rollup/plugin-terser';
 import nodePolyfills from 'rollup-plugin-polyfill-node';
 import babel from '@rollup/plugin-babel';
 
-
 // RELEASE_TYPE environment variable is set by the CI/CD pipeline
 const releaseType = process.env.RELEASE_TYPE || 'alpha';
 
@@ -48,8 +47,8 @@ const getFileBuild = (inputFilename) => [
       nodeResolve({
         resolveOnly: getPackages(),
       }),
-      commonJs(),
       json(),
+      commonJs(),
       typescript({
         declaration: true,
         declarationDir: './dist/types',
diff --git a/yarn.lock b/yarn.lock
index b6934a1c9c..0625894127 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2902,7 +2902,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@ethersproject/abi@npm:5.7.0, @ethersproject/abi@npm:^5.0.0, @ethersproject/abi@npm:^5.0.12, @ethersproject/abi@npm:^5.5.0, @ethersproject/abi@npm:^5.7.0":
+"@ethersproject/abi@npm:5.7.0, @ethersproject/abi@npm:^5.0.12, @ethersproject/abi@npm:^5.5.0, @ethersproject/abi@npm:^5.7.0":
   version: 5.7.0
   resolution: "@ethersproject/abi@npm:5.7.0"
   dependencies:
@@ -2990,7 +2990,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@ethersproject/bytes@npm:5.7.0, @ethersproject/bytes@npm:^5.0.0, @ethersproject/bytes@npm:^5.7.0":
+"@ethersproject/bytes@npm:5.7.0, @ethersproject/bytes@npm:^5.7.0":
   version: 5.7.0
   resolution: "@ethersproject/bytes@npm:5.7.0"
   dependencies:
@@ -3129,7 +3129,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@ethersproject/providers@npm:5.7.2, @ethersproject/providers@npm:^5.0.0, @ethersproject/providers@npm:^5.7.2":
+"@ethersproject/providers@npm:5.7.2, @ethersproject/providers@npm:^5.7.2":
   version: 5.7.2
   resolution: "@ethersproject/providers@npm:5.7.2"
   dependencies:
@@ -3575,24 +3575,6 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@imtbl/core-sdk@npm:^2.7.0":
-  version: 2.7.0
-  resolution: "@imtbl/core-sdk@npm:2.7.0"
-  dependencies:
-    "@ethersproject/abi": ^5.0.0
-    "@ethersproject/bytes": ^5.0.0
-    "@ethersproject/providers": ^5.0.0
-    axios: ^0.26.1
-    bn.js: ^5.2.0
-    elliptic: ^6.5.4
-    enc-utils: ^3.0.0
-    ethereumjs-wallet: ^1.0.2
-    ethers: ^5.7.1
-    hash.js: ^1.1.7
-  checksum: ea9bed1eceda1563d9ba50db29935ad0b4131cce3f1bf8e50f6bad28f3f301969b399319e8d6417e7546098c77850aa70c316ea48ecbfa7d28e85a27a206f234
-  languageName: node
-  linkType: hard
-
 "@imtbl/cryptofiat@0.0.0, @imtbl/cryptofiat@workspace:packages/internal/cryptofiat":
   version: 0.0.0-use.local
   resolution: "@imtbl/cryptofiat@workspace:packages/internal/cryptofiat"
@@ -3862,7 +3844,6 @@ __metadata:
     "@imtbl/checkout-sdk": 0.0.0
     "@imtbl/checkout-widgets": 0.0.0
     "@imtbl/config": 0.0.0
-    "@imtbl/core-sdk": ^2.7.0
     "@imtbl/cryptofiat": 0.0.0
     "@imtbl/generated-clients": 0.0.0
     "@imtbl/guardian": 0.0.0
@@ -3992,11 +3973,9 @@ __metadata:
     "@ethersproject/strings": ^5.7.0
     "@ethersproject/wallet": ^5.7.0
     "@imtbl/config": 0.0.0
-    "@imtbl/core-sdk": ^2.7.0
     "@imtbl/generated-clients": 0.0.0
     "@rollup/plugin-typescript": ^11.0.0
     "@swc/jest": ^0.2.24
-    "@types/elliptic": ^6.4.18
     "@types/jest": ^29.4.3
     axios: ^1.6.5
     bn.js: ^5.2.1
@@ -9042,15 +9021,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/bn.js@npm:*":
-  version: 5.1.5
-  resolution: "@types/bn.js@npm:5.1.5"
-  dependencies:
-    "@types/node": "*"
-  checksum: c87b28c4af74545624f8a3dae5294b16aa190c222626e8d4b2e327b33b1a3f1eeb43e7a24d914a9774bca43d8cd6e1cb0325c1f4b3a244af6693a024e1d918e6
-  languageName: node
-  linkType: hard
-
 "@types/bn.js@npm:^4.11.5":
   version: 4.11.6
   resolution: "@types/bn.js@npm:4.11.6"
@@ -9135,15 +9105,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/elliptic@npm:^6.4.18":
-  version: 6.4.18
-  resolution: "@types/elliptic@npm:6.4.18"
-  dependencies:
-    "@types/bn.js": "*"
-  checksum: c27613c530fb95441e5e6b456c8c9bc26568ca14c546aae6d7c1d8d46869f79a2272feaef266ac00bdb68b2671e6351ed01b91b82266eac30ca9092720825d16
-  languageName: node
-  linkType: hard
-
 "@types/emscripten@npm:^1.39.6":
   version: 1.39.6
   resolution: "@types/emscripten@npm:1.39.6"
@@ -11788,15 +11749,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"axios@npm:^0.26.1":
-  version: 0.26.1
-  resolution: "axios@npm:0.26.1"
-  dependencies:
-    follow-redirects: ^1.14.8
-  checksum: d9eb58ff4bc0b36a04783fc9ff760e9245c829a5a1052ee7ca6013410d427036b1d10d04e7380c02f3508c5eaf3485b1ae67bd2adbfec3683704745c8d7a6e1a
-  languageName: node
-  linkType: hard
-
 "axios@npm:^1.6.5":
   version: 1.6.5
   resolution: "axios@npm:1.6.5"
@@ -16067,7 +16019,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ethers@npm:^5.7.1, ethers@npm:^5.7.2":
+"ethers@npm:^5.7.2":
   version: 5.7.2
   resolution: "ethers@npm:5.7.2"
   dependencies:
@@ -16680,16 +16632,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"follow-redirects@npm:^1.14.8":
-  version: 1.15.6
-  resolution: "follow-redirects@npm:1.15.6"
-  peerDependenciesMeta:
-    debug:
-      optional: true
-  checksum: a62c378dfc8c00f60b9c80cab158ba54e99ba0239a5dd7c81245e5a5b39d10f0c35e249c3379eae719ff0285fff88c365dd446fab19dee771f1d76252df1bbf5
-  languageName: node
-  linkType: hard
-
 "follow-redirects@npm:^1.15.4":
   version: 1.15.4
   resolution: "follow-redirects@npm:1.15.4"