diff --git a/src/axios.ts b/src/axios.ts
index a873002..da357ea 100644
--- a/src/axios.ts
+++ b/src/axios.ts
@@ -1,41 +1,46 @@
-import Axios, {AxiosError, AxiosRequestConfig} from "axios";
-import {S5Error} from "./client.js";
+import Axios, { AxiosError, AxiosRequestConfig } from "axios";
+import { S5Error } from "./client.js";
 
 export interface CancelablePromise<T> extends Promise<T> {
-    cancel: () => void;
+  cancel: () => void;
 }
 
 export const customInstance = <T>(
-    config: AxiosRequestConfig,
-    options?: AxiosRequestConfig,
+  config: AxiosRequestConfig,
+  options?: AxiosRequestConfig,
 ): CancelablePromise<T> => {
-    const source = Axios.CancelToken.source();
+  const source = Axios.CancelToken.source();
 
-    /*
+  /*
       Hack to ensure that the data is passed to the request as an option.
        */
-    if (options?.data) {
-        config = config || {};
-        config.data = options.data;
-        delete config.data;
-    }
+  if (options?.data) {
+    config = config || {};
+    config.data = options.data;
+    delete config.data;
+  }
 
-    const instance = Axios.create({baseURL: options?.baseURL});
-    const promise = instance({
-        ...config,
-        ...options,
-        cancelToken: source.token,
-    }).then(({data}) => data).catch((error) => {
-        if (Axios.isCancel(error)) {
-            return;
-        }
-        throw new S5Error((error as AxiosError).message, (error as AxiosError).response?.status as number);
-    })
+  const instance = Axios.create({ baseURL: options?.baseURL });
+  const promise = instance({
+    ...config,
+    ...options,
+    cancelToken: source.token,
+  })
+    .then(({ data }) => data)
+    .catch((error) => {
+      if (Axios.isCancel(error)) {
+        return;
+      }
+      throw new S5Error(
+        (error as AxiosError).message,
+        (error as AxiosError).response?.status as number,
+      );
+    });
 
-    // @ts-ignore
-    promise.cancel = () => {
-        source.cancel("Query was cancelled");
-    };
+  // @ts-ignore
+  promise.cancel = () => {
+    source.cancel("Query was cancelled");
+  };
 
-    return promise as CancelablePromise<T>;
+  return promise as CancelablePromise<T>;
 };
diff --git a/src/client.ts b/src/client.ts
index de40043..ce9b8db 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -71,13 +71,13 @@ import { blake3 } from "@noble/hashes/blake3";
 import { base64urlDecode, base64urlEncode } from "./utils/encoding.js";
 
 export class S5Error extends Error {
-    public statusCode: number;
+  public statusCode: number;
 
-    constructor(message: string, statusCode: number) {
-        super(message);
-        this.name = "S5Error";
-        this.statusCode = statusCode;
-    }
+  constructor(message: string, statusCode: number) {
+    super(message);
+    this.name = "S5Error";
+    this.statusCode = statusCode;
+  }
 }
 
 /**
diff --git a/src/utils/options.ts b/src/utils/options.ts
index cf90fb8..469058f 100644
--- a/src/utils/options.ts
+++ b/src/utils/options.ts
@@ -18,6 +18,7 @@ export type CustomClientOptions = {
   customCookie?: string;
   onDownloadProgress?: (progressEvent: AxiosProgressEvent) => void;
   onUploadProgress?: (progressEvent: AxiosProgressEvent) => void;
+  httpConfig?: AxiosRequestConfig;
 };
 
 export function optionsToConfig(
@@ -29,7 +30,7 @@ export function optionsToConfig(
     | CustomRegistryOptions
   )[]
 ): AxiosRequestConfig {
-  const config: AxiosRequestConfig = {};
+  let config: AxiosRequestConfig = {};
 
   config.baseURL = client.portalUrl;
 
@@ -75,5 +76,12 @@ export function optionsToConfig(
 
   config.headers = headers;
 
+  if (finalOptions?.httpConfig) {
+    config = {
+      ...config,
+      ...finalOptions.httpConfig,
+    };
+  }
+
   return config;
 }