diff --git a/package-lock.json b/package-lock.json
index c7067d1..096c54e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.3.4",
+  "version": "0.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@orionprotocol/sdk",
-      "version": "0.3.4",
+      "version": "0.4.0",
       "license": "ISC",
       "dependencies": {
         "@ethersproject/abstract-signer": "^5.6.0",
@@ -16,10 +16,10 @@
         "buffer": "^6.0.3",
         "crypto-browserify": "^3.12.0",
         "ethers": "^5.6.2",
+        "isomorphic-unfetch": "^3.1.0",
         "isomorphic-ws": "^4.0.1",
         "just-clone": "^5.0.1",
         "neverthrow": "^4.3.1",
-        "node-fetch": "^2.6.7",
         "socket.io-client": "2.4.0",
         "stream-browserify": "^3.0.0",
         "tiny-invariant": "^1.2.0",
@@ -30,7 +30,6 @@
       "devDependencies": {
         "@typechain/ethers-v5": "^10.0.0",
         "@types/node": "^17.0.23",
-        "@types/node-fetch": "^2.6.1",
         "@types/socket.io-client": "1.4.33",
         "@types/uuid": "^8.3.4",
         "@types/ws": "^8.5.3",
@@ -2630,16 +2629,6 @@
       "integrity": "sha512-UxDxWn7dl97rKVeVS61vErvw086aCYhDLyvRQZ5Rk65rZKepaFdm53GeqXaKBuOhED4e9uWq34IC3TdSdJJ2Gw==",
       "dev": true
     },
-    "node_modules/@types/node-fetch": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/@types/node-fetch/-/node-fetch-2.6.1.tgz",
-      "integrity": "sha512-oMqjURCaxoSIsHSr1E47QHzbmzNR5rK8McHuNb11BOM9cHcIK3Avy0s/b2JlXHoQGTYS3NsvWzV1M0iK7l0wbA==",
-      "dev": true,
-      "dependencies": {
-        "@types/node": "*",
-        "form-data": "^3.0.0"
-      }
-    },
     "node_modules/@types/prettier": {
       "version": "2.4.4",
       "dev": true,
@@ -6500,6 +6489,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/isomorphic-unfetch": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/isomorphic-unfetch/-/isomorphic-unfetch-3.1.0.tgz",
+      "integrity": "sha512-geDJjpoZ8N0kWexiwkX8F9NkTsXhetLPVbZFQ+JTW239QNOwvB0gniuR1Wc6f0AMTn7/mFGyXvHTifrCp/GH8Q==",
+      "dependencies": {
+        "node-fetch": "^2.6.1",
+        "unfetch": "^4.2.0"
+      }
+    },
     "node_modules/isomorphic-ws": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/isomorphic-ws/-/isomorphic-ws-4.0.1.tgz",
@@ -10656,6 +10654,11 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/unfetch": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/unfetch/-/unfetch-4.2.0.tgz",
+      "integrity": "sha512-F9p7yYCn6cIW9El1zi0HI6vqpeIvBsr3dSuRO6Xuppb1u5rXpCPmMvLSyECLhybr9isec8Ohl0hPekMVrEinDA=="
+    },
     "node_modules/universalify": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
@@ -12825,16 +12828,6 @@
       "integrity": "sha512-UxDxWn7dl97rKVeVS61vErvw086aCYhDLyvRQZ5Rk65rZKepaFdm53GeqXaKBuOhED4e9uWq34IC3TdSdJJ2Gw==",
       "dev": true
     },
-    "@types/node-fetch": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/@types/node-fetch/-/node-fetch-2.6.1.tgz",
-      "integrity": "sha512-oMqjURCaxoSIsHSr1E47QHzbmzNR5rK8McHuNb11BOM9cHcIK3Avy0s/b2JlXHoQGTYS3NsvWzV1M0iK7l0wbA==",
-      "dev": true,
-      "requires": {
-        "@types/node": "*",
-        "form-data": "^3.0.0"
-      }
-    },
     "@types/prettier": {
       "version": "2.4.4",
       "dev": true
@@ -15595,6 +15588,15 @@
       "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
       "dev": true
     },
+    "isomorphic-unfetch": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/isomorphic-unfetch/-/isomorphic-unfetch-3.1.0.tgz",
+      "integrity": "sha512-geDJjpoZ8N0kWexiwkX8F9NkTsXhetLPVbZFQ+JTW239QNOwvB0gniuR1Wc6f0AMTn7/mFGyXvHTifrCp/GH8Q==",
+      "requires": {
+        "node-fetch": "^2.6.1",
+        "unfetch": "^4.2.0"
+      }
+    },
     "isomorphic-ws": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/isomorphic-ws/-/isomorphic-ws-4.0.1.tgz",
@@ -18528,6 +18530,11 @@
         "which-boxed-primitive": "^1.0.2"
       }
     },
+    "unfetch": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/unfetch/-/unfetch-4.2.0.tgz",
+      "integrity": "sha512-F9p7yYCn6cIW9El1zi0HI6vqpeIvBsr3dSuRO6Xuppb1u5rXpCPmMvLSyECLhybr9isec8Ohl0hPekMVrEinDA=="
+    },
     "universalify": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
diff --git a/package.json b/package.json
index b9d4fc8..73149e1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Orion Protocol SDK",
   "main": "./lib/esm/index.js",
   "module": "./lib/esm/index.js",
@@ -40,7 +40,6 @@
   "devDependencies": {
     "@typechain/ethers-v5": "^10.0.0",
     "@types/node": "^17.0.23",
-    "@types/node-fetch": "^2.6.1",
     "@types/socket.io-client": "1.4.33",
     "@types/uuid": "^8.3.4",
     "@types/ws": "^8.5.3",
@@ -68,10 +67,10 @@
     "buffer": "^6.0.3",
     "crypto-browserify": "^3.12.0",
     "ethers": "^5.6.2",
+    "isomorphic-unfetch": "^3.1.0",
     "isomorphic-ws": "^4.0.1",
     "just-clone": "^5.0.1",
     "neverthrow": "^4.3.1",
-    "node-fetch": "^2.6.7",
     "socket.io-client": "2.4.0",
     "stream-browserify": "^3.0.0",
     "tiny-invariant": "^1.2.0",
diff --git a/src/fetchWithValidation.ts b/src/fetchWithValidation.ts
index 207d9e0..76363e7 100644
--- a/src/fetchWithValidation.ts
+++ b/src/fetchWithValidation.ts
@@ -1,5 +1,6 @@
 import { Schema, z } from 'zod';
-import fetch, { FetchError, RequestInit } from 'node-fetch';
+import fetch from 'isomorphic-unfetch';
+
 import {
   err, fromPromise, fromThrowable, ok,
 } from 'neverthrow';
@@ -32,17 +33,10 @@ export default async function fetchWithValidation<DataOut, DataIn, ErrorOut, Err
       ...(options ? options.headers : {}),
     },
   }), (e) => {
-    if (e instanceof FetchError) {
+    if (e instanceof Error) {
       return err({
         type: 'fetchError' as const,
         url,
-        message: `${e.message} (${e.type})`,
-        error: e,
-      });
-    } if (e instanceof Error) {
-      return err({
-        type: 'unknownFetchError' as const,
-        url,
         message: e.message,
         error: e,
       });
diff --git a/src/simpleFetch.ts b/src/simpleFetch.ts
index 494ecc1..1f06647 100644
--- a/src/simpleFetch.ts
+++ b/src/simpleFetch.ts
@@ -1,5 +1,4 @@
 import { Schema, z } from 'zod';
-import { RequestInit } from 'node-fetch';
 import fetchWithValidation from './fetchWithValidation';
 
 // https://stackoverflow.com/a/64919133