diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30fd571..85c715d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.0.8
+
+- Remove dependencies with advisories.
+
 ## 1.0.7
 
 - Added `SimpleMerkleTree` class that supports `bytes32` leaves with no extra hashing.
diff --git a/package-lock.json b/package-lock.json
index a297841..017d00e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,10 +9,9 @@
       "version": "1.0.7",
       "license": "MIT",
       "dependencies": {
-        "@ethersproject/abi": "^5.7.0",
-        "@ethersproject/bytes": "^5.7.0",
-        "@ethersproject/constants": "^5.7.0",
-        "@ethersproject/keccak256": "^5.7.0"
+        "@metamask/abi-utils": "^2.0.4",
+        "@metamask/utils": "^9.3.0",
+        "ethereum-cryptography": "^3.0.0"
       },
       "devDependencies": {
         "@fast-check/ava": "^1.2.1",
@@ -113,378 +112,167 @@
         "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
       }
     },
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-      "funding": [
-        {
-          "type": "individual",
-          "url": "https://gitcoin.co/grants/13/ethersjs-complete-simple-and-tiny-2"
-        },
-        {
-          "type": "individual",
-          "url": "https://www.buymeacoffee.com/ricmoo"
-        }
-      ],
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-        "@ethersproject/bignumber": "^5.7.0",
-        "@ethersproject/bytes": "^5.7.0",
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-        "@ethersproject/logger": "^5.7.0",
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-        "@ethersproject/strings": "^5.7.0"
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-        },
-        {
-          "type": "individual",
-          "url": "https://www.buymeacoffee.com/ricmoo"
-        }
-      ],
+    "node_modules/@ethereumjs/common": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@ethereumjs/common/-/common-3.2.0.tgz",
+      "integrity": "sha512-pksvzI0VyLgmuEF2FA/JR/4/y6hcPq8OUail3/AvycBaW1d5VSauOZzqGvJ3RTmR4MU35lWE8KseKOsEhrFRBA==",
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-        "@ethersproject/properties": "^5.7.0",
-        "@ethersproject/transactions": "^5.7.0",
-        "@ethersproject/web": "^5.7.0"
+        "@ethereumjs/util": "^8.1.0",
+        "crc-32": "^1.2.0"
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+      "bin": {
+        "rlp": "bin/rlp"
+      },
+      "engines": {
+        "node": ">=14"
       }
     },
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+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/micro-ftch/-/micro-ftch-0.3.1.tgz",
+      "integrity": "sha512-/0LLxhzP0tfiR5hcQebtudP56gUurs2CLkGarnCiB/OqEyUFQ6U3paQi/tgLv0hBJYt2rnr9MNpxz4fiiugstg=="
+    },
     "node_modules/micromatch": {
       "version": "4.0.5",
       "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.5.tgz",
@@ -3094,16 +2980,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/minimalistic-assert": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz",
-      "integrity": "sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A=="
-    },
-    "node_modules/minimalistic-crypto-utils": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz",
-      "integrity": "sha512-JIYlbt6g8i5jKfJ3xz7rF0LXmv2TkDxBLUkiBeZ7bAx4GnnNMr8xFpGnOxn6GhTEHx3SjRrZEoU+j04prX1ktg=="
-    },
     "node_modules/minimatch": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
@@ -3458,6 +3334,14 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/pony-cause": {
+      "version": "2.1.11",
+      "resolved": "https://registry.npmjs.org/pony-cause/-/pony-cause-2.1.11.tgz",
+      "integrity": "sha512-M7LhCsdNbNgiLYiP4WjsfLUuFmCfnjdF6jKe2R9NKl4WFN+HZPGHJZ9lnLP7f9ZnKe3U9nuWD0szirmj+migUg==",
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/prelude-ls": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",
@@ -3747,7 +3631,6 @@
       "version": "7.5.4",
       "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.4.tgz",
       "integrity": "sha512-1bCSESV6Pv+i21Hvpxp3Dx+pSD8lIPt8uVjRrxAUt/nbswYc+tK6Y2btiULjd4+fnq15PX+nqQDC7Oft7WkwcA==",
-      "dev": true,
       "dependencies": {
         "lru-cache": "^6.0.0"
       },
@@ -4266,6 +4149,18 @@
       "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
       "dev": true
     },
+    "node_modules/uuid": {
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-9.0.1.tgz",
+      "integrity": "sha512-b+1eJOlsR9K8HJpow9Ok3fiWOWSIcIzXodvv0rQjVoOVNpWMpxf1wZNpt4y9h10odCNrqnYp1OBzRktckBe3sA==",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
     "node_modules/v8-compile-cache-lib": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",
@@ -4423,8 +4318,7 @@
     "node_modules/yallist": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
-      "dev": true
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
     },
     "node_modules/yargs": {
       "version": "16.2.0",
diff --git a/package.json b/package.json
index 389c57d..aaa8cca 100644
--- a/package.json
+++ b/package.json
@@ -26,10 +26,8 @@
   "author": "Francisco Giordano <fg@frang.io>",
   "license": "MIT",
   "dependencies": {
-    "@ethersproject/abi": "^5.7.0",
-    "@ethersproject/bytes": "^5.7.0",
-    "@ethersproject/constants": "^5.7.0",
-    "@ethersproject/keccak256": "^5.7.0"
+    "@metamask/abi-utils": "^2.0.4",
+    "ethereum-cryptography": "^3.0.0"
   },
   "devDependencies": {
     "@fast-check/ava": "^1.2.1",
diff --git a/src/bytes.test.ts b/src/bytes.test.ts
new file mode 100644
index 0000000..b49ae30
--- /dev/null
+++ b/src/bytes.test.ts
@@ -0,0 +1,25 @@
+import test from 'ava';
+
+import * as bytes from './bytes';
+
+test('toBytes', t => {
+  const empty = Uint8Array.of();
+  t.deepEqual(bytes.toBytes('0x'), empty);
+  t.deepEqual(bytes.toBytes([]), empty);
+
+  const onetwothree = Uint8Array.of(1, 2, 3);
+  t.deepEqual(bytes.toBytes('0x010203'), onetwothree);
+  t.deepEqual(bytes.toBytes('010203'), onetwothree);
+  t.deepEqual(bytes.toBytes([1, 2, 3]), onetwothree);
+  t.deepEqual(bytes.toBytes(Uint8Array.of(1, 2, 3)), onetwothree);
+});
+
+test('toHex', t => {
+  t.is(bytes.toHex('0x'), '0x');
+  t.is(bytes.toHex([]), '0x');
+
+  t.is(bytes.toHex('0x010203'), '0x010203');
+  t.is(bytes.toHex('010203'), '0x010203');
+  t.is(bytes.toHex([1, 2, 3]), '0x010203');
+  t.is(bytes.toHex(Uint8Array.of(1, 2, 3)), '0x010203');
+});
diff --git a/src/bytes.ts b/src/bytes.ts
index 938c013..53700e4 100644
--- a/src/bytes.ts
+++ b/src/bytes.ts
@@ -1,12 +1,38 @@
-import type { BytesLike } from '@ethersproject/bytes';
+type Bytes = Uint8Array;
+type BytesLike = readonly number[] | Uint8Array | string;
 type HexString = string;
 
-import { arrayify as toBytes, hexlify as toHex, concat } from '@ethersproject/bytes';
+import { hexToBytes, bytesToHex, concatBytes } from 'ethereum-cryptography/utils';
+
+function toBytes(value: BytesLike): Bytes {
+  if (value instanceof Uint8Array) {
+    return value;
+  } else if (typeof value === 'string') {
+    return hexToBytes(value);
+  } else {
+    return new Uint8Array(value);
+  }
+}
+
+function toHex(value: BytesLike): HexString {
+  if (typeof value === 'string') {
+    hexToBytes(value); // assert hex string
+    return value.replace(/^(0x)?/, '0x');
+  } else if (value instanceof Uint8Array) {
+    return '0x' + bytesToHex(value);
+  } else {
+    return '0x' + bytesToHex(new Uint8Array(value));
+  }
+}
+
+function concat(values: BytesLike[]): Bytes {
+  return concatBytes(...values.map(toBytes));
+}
 
 function compare(a: BytesLike, b: BytesLike): number {
   const diff = BigInt(toHex(a)) - BigInt(toHex(b));
   return diff > 0 ? 1 : diff < 0 ? -1 : 0;
 }
 
-export type { HexString, BytesLike };
+export type { HexString, BytesLike, Bytes };
 export { toBytes, toHex, concat, compare };
diff --git a/src/core.test.ts b/src/core.test.ts
index 53d8f4c..abfc389 100644
--- a/src/core.test.ts
+++ b/src/core.test.ts
@@ -1,5 +1,4 @@
 import { test, testProp, fc } from '@fast-check/ava';
-import { HashZero as zero } from '@ethersproject/constants';
 import {
   makeMerkleTree,
   getProof,
@@ -9,9 +8,11 @@ import {
   isValidMerkleTree,
   renderMerkleTree,
 } from './core';
-import { toHex } from './bytes';
+import { HexString, toHex } from './bytes';
 import { InvalidArgumentError, InvariantError } from './utils/errors';
 
+const zero: HexString = '0x0000000000000000000000000000000000000000000000000000000000000000';
+
 const leaf = fc.uint8Array({ minLength: 32, maxLength: 32 });
 const leaves = fc.array(leaf, { minLength: 1 });
 const leavesAndIndex = leaves.chain(xs => fc.tuple(fc.constant(xs), fc.nat({ max: xs.length - 1 })));
diff --git a/src/core.ts b/src/core.ts
index c02d267..4717b15 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -36,7 +36,7 @@ export function makeMerkleTree(leaves: BytesLike[], nodeHash: NodeHash = standar
 export function getProof(tree: BytesLike[], index: number): HexString[] {
   checkLeafNode(tree, index);
 
-  const proof = [];
+  const proof: HexString[] = [];
   while (index > 0) {
     proof.push(toHex(tree[siblingIndex(index)]!));
     index = parentIndex(index);
@@ -67,7 +67,7 @@ export function getMultiProof(tree: BytesLike[], indices: number[]): MultiProof<
   );
 
   const stack = Array.from(indices); // copy
-  const proof = [];
+  const proof: HexString[] = [];
   const proofFlags = [];
 
   while (stack.length > 0 && stack[0]! > 0) {
diff --git a/src/hashes.ts b/src/hashes.ts
index fcda8b6..57c1021 100644
--- a/src/hashes.ts
+++ b/src/hashes.ts
@@ -1,12 +1,16 @@
-import { defaultAbiCoder } from '@ethersproject/abi';
-import { keccak256 } from '@ethersproject/keccak256';
-import { BytesLike, HexString, concat, compare } from './bytes';
+import { encode } from '@metamask/abi-utils';
+import { keccak256 as _keccak256 } from 'ethereum-cryptography/keccak';
+import { BytesLike, HexString, toHex, toBytes, concat, compare } from './bytes';
 
 export type LeafHash<T> = (leaf: T) => HexString;
 export type NodeHash = (left: BytesLike, right: BytesLike) => HexString;
 
+export function keccak256(input: BytesLike): HexString {
+  return toHex(_keccak256(toBytes(input)));
+}
+
 export function standardLeafHash<T extends any[]>(types: string[], value: T): HexString {
-  return keccak256(keccak256(defaultAbiCoder.encode(types, value)));
+  return keccak256(keccak256(encode(types, value)));
 }
 
 export function standardNodeHash(a: BytesLike, b: BytesLike): HexString {
diff --git a/src/simple.test.ts b/src/simple.test.ts
index 5bfb64c..fbcddac 100644
--- a/src/simple.test.ts
+++ b/src/simple.test.ts
@@ -1,10 +1,11 @@
 import { test, testProp, fc } from '@fast-check/ava';
-import { HashZero as zero } from '@ethersproject/constants';
-import { keccak256 } from '@ethersproject/keccak256';
 import { SimpleMerkleTree } from './simple';
 import { BytesLike, HexString, concat, compare, toHex } from './bytes';
+import { keccak256 } from './hashes';
 import { InvalidArgumentError, InvariantError } from './utils/errors';
 
+const zero: HexString = '0x0000000000000000000000000000000000000000000000000000000000000000';
+
 fc.configureGlobal({ numRuns: process.env.CI ? 5000 : 100 });
 
 const reverseNodeHash = (a: BytesLike, b: BytesLike): HexString => keccak256(concat([a, b].sort(compare).reverse()));
@@ -149,7 +150,7 @@ testProp('reject loading dump with wrong node hash', [fc.array(leaf, { minLength
 test('reject invalid leaf size', t => {
   const invalidLeaf = '0x000000000000000000000000000000000000000000000000000000000000000000';
   t.throws(() => SimpleMerkleTree.of([invalidLeaf]), {
-    message: `incorrect data length (argument=null, value="${invalidLeaf}", code=INVALID_ARGUMENT, version=abi/5.7.0)`,
+    message: 'Unable to encode value: Expected a value of length 32, but received a value of length 33.',
   });
 });
 
diff --git a/src/simple.ts b/src/simple.ts
index ff1d550..861d6f2 100644
--- a/src/simple.ts
+++ b/src/simple.ts
@@ -1,4 +1,4 @@
-import { defaultAbiCoder } from '@ethersproject/abi';
+import { encode } from '@metamask/abi-utils';
 import { BytesLike, HexString, toHex } from './bytes';
 import { MultiProof, processProof, processMultiProof } from './core';
 import { MerkleTreeData, MerkleTreeImpl } from './merkletree';
@@ -16,7 +16,7 @@ export interface SimpleMerkleTreeOptions extends MerkleTreeOptions {
 }
 
 export function formatLeaf(value: BytesLike): HexString {
-  return defaultAbiCoder.encode(['bytes32'], [value]);
+  return toHex(encode(['bytes32'], [value]));
 }
 
 export class SimpleMerkleTree extends MerkleTreeImpl<BytesLike> {
diff --git a/src/standard.test.ts b/src/standard.test.ts
index 6d7f404..64f0177 100644
--- a/src/standard.test.ts
+++ b/src/standard.test.ts
@@ -1,9 +1,11 @@
 import { test, testProp, fc } from '@fast-check/ava';
-import { HashZero as zero } from '@ethersproject/constants';
-import { keccak256 } from '@ethersproject/keccak256';
 import { StandardMerkleTree } from './standard';
+import { HexString } from './bytes';
+import { keccak256 } from './hashes';
 import { InvalidArgumentError, InvariantError } from './utils/errors';
 
+const zero: HexString = '0x0000000000000000000000000000000000000000000000000000000000000000';
+
 fc.configureGlobal({ numRuns: process.env.CI ? 5000 : 100 });
 
 const leafEncoding = ['uint256', 'string[]'];