diff --git a/README.md b/README.md
index 34807bf..030d527 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ Short Form    | Long Form     | Description
 -r            | --regex       | RegEx for filtering purposes against found endpoints (e.g. ^/api/)
 -d            | --domain      | Toggle to use when analyzing an entire domain. Enumerates over all found JS files.
 -b            | --burp        | Toggle to use when inputting a Burp 'Save selected' file containing multiple JS files
+-H            | --header      | Add header for request. You can add multiple headers. e.g. -H "Authorization: Bearer <Token>" -H "X-Api-Key: key"
 -c            | --cookies     | Add cookies to the request
 -h            | --help        | show the help message and exit
 
@@ -67,6 +68,10 @@ Short Form    | Long Form     | Description
 
 `python linkfinder.py -i 'Desktop/*.js' -r ^/api/ -o results.html`
 
+* Using custom header like bearer token for authenticaton:
+
+`python linkfinder.py -i https://example.com/1.js -H "Authorization: Bearer <Token>"`
+
 ## Docker
 
 * Build the Docker image:
diff --git a/linkfinder.py b/linkfinder.py
index 6675322..936eda0 100755
--- a/linkfinder.py
+++ b/linkfinder.py
@@ -116,7 +116,7 @@ def parser_input(input):
 be found (maybe you forgot to add http/https).")]
 
 
-def send_request(url):
+def send_request(url, custom_headers):
     '''
     Send requests with Requests
     '''
@@ -130,6 +130,9 @@ def send_request(url):
     q.add_header('Accept-Encoding', 'gzip')
     q.add_header('Cookie', args.cookies)
 
+    for key, value in custom_headers.items():
+        q.add_header(key, value)
+
     try:
         sslcontext = ssl.create_default_context()
         response = urlopen(q, timeout=args.timeout, context=sslcontext)
@@ -306,6 +309,9 @@ def check_url(url):
     parser.add_argument("-b", "--burp",
                         help="",
                         action="store_true")
+    parser.add_argument('-H', '--header',
+                        help='Add header for request. You can add multiple headers. \ne.g. -H "Authorization: Bearer <Token>" -H "X-Api-Key: key"'
+                        action='append')
     parser.add_argument("-c", "--cookies",
                         help="Add cookies for authenticated JS files",
                         action="store", default="")
@@ -325,12 +331,18 @@ def check_url(url):
     # Convert input to URLs or JS files
     urls = parser_input(args.input)
 
+    custom_headers = {}
+    if args.header:
+        for header in args.header:
+            key, value = header.split(':', 1)
+            custom_headers[key.strip()] = value.strip()
+
     # Convert URLs to JS
     output = ''
     for url in urls:
         if not args.burp:
             try:
-                file = send_request(url)
+                file = send_request(url, custom_headers)
             except Exception as e:
                 parser_error("invalid input defined or SSL error: %s" % e)
         else: