diff --git a/packages/errors/src/TankerError.ts b/packages/errors/src/TankerError.ts
index d1b7a7d1..09825f47 100644
--- a/packages/errors/src/TankerError.ts
+++ b/packages/errors/src/TankerError.ts
@@ -6,6 +6,7 @@ export class TankerError extends Error {
   declare apiMethod?: string;
   declare apiRoute?: string;
   declare httpStatus?: number;
+  declare next?: Error;
   declare traceId?: string;
 
   constructor(name: string = 'TankerError', errorInfo?: ErrorInfo) {
diff --git a/packages/errors/src/errors/DecryptionFailed.ts b/packages/errors/src/errors/DecryptionFailed.ts
index ca50dec9..8d19ae8b 100644
--- a/packages/errors/src/errors/DecryptionFailed.ts
+++ b/packages/errors/src/errors/DecryptionFailed.ts
@@ -3,8 +3,6 @@ import { TankerError } from '../TankerError';
 export class DecryptionFailed extends TankerError {
   b64ResourceId?: string;
 
-  next?: Error;
-
   constructor(args: { error?: Error; message?: string; b64ResourceId?: string; }) {
     const { error, b64ResourceId } = args;
     let message = args.message;
diff --git a/packages/errors/src/errors/NetworkError.ts b/packages/errors/src/errors/NetworkError.ts
index 84d446e5..3440c04a 100644
--- a/packages/errors/src/errors/NetworkError.ts
+++ b/packages/errors/src/errors/NetworkError.ts
@@ -2,10 +2,12 @@ import type { ErrorInfo } from '../ErrorInfo';
 import { TankerError } from '../TankerError';
 
 export class NetworkError extends TankerError {
-  constructor(errorInfo?: ErrorInfo) {
+  constructor(errorInfo?: ErrorInfo, next?: Error) {
     super('NetworkError', errorInfo || 'Network error');
 
     // Set the prototype explicitly.
     Object.setPrototypeOf(this, NetworkError.prototype);
+
+    this.next = next;
   }
 }
diff --git a/packages/http-utils/src/fetch.ts b/packages/http-utils/src/fetch.ts
index 40eb2fa4..523894f5 100644
--- a/packages/http-utils/src/fetch.ts
+++ b/packages/http-utils/src/fetch.ts
@@ -13,7 +13,7 @@ if (globalThis.fetch && globalThis.Promise) {
 }
 
 const fetch = (input: RequestInfo, init?: RequestInit): Promise<Response> => baseFetch(input, { ...init, referrerPolicy: 'no-referrer' }).catch((err: Error) => {
-  throw new NetworkError(err.toString());
+  throw new NetworkError(err.toString(), err);
 });
 
 export { fetch };