diff --git a/3.3 - IIIF collection from SPARQL.ipynb b/3.1 - IIIF Collection from SPARQL.ipynb
similarity index 100%
rename from 3.3 - IIIF collection from SPARQL.ipynb
rename to 3.1 - IIIF Collection from SPARQL.ipynb
diff --git a/4.1 - Webarchive - Interacting with the API.ipynb b/4.1 - Webarchive - Interacting with the API.ipynb
index fc5d1ca57fcd5b1e78318a866f38d0a44f6a7d65..e68c12f291b782301666e4e6745a82a51bfeef51 100644
--- a/4.1 - Webarchive - Interacting with the API.ipynb	
+++ b/4.1 - Webarchive - Interacting with the API.ipynb	
@@ -922,7 +922,7 @@
    },
    "outputs": [],
    "source": [
-    "session = webarchiv.WebarchivSession(API_KEY)"
+    "session = webarchiv.WebarchivSession(API_KEY, allow_tracking=True)"
    ]
   },
   {
diff --git a/webarchiv.py b/webarchiv.py
index adb00148b31239e2e740a6f31722f9d53c697fa4..af8caf73329b6a10119c34f47570933782ec1571 100644
--- a/webarchiv.py
+++ b/webarchiv.py
@@ -1,6 +1,8 @@
 import sys
 import time
 import requests
+import uuid
+import hashlib
 from requests import HTTPError
 
 _datetime_format_string = '%Y%m%d%H%M%S'
@@ -45,8 +47,9 @@ class WebarchivSession:
         """
         return 'HTTP ERROR - status code {status_code}\n----\n{response_text}\n----\n\n'
 
-    def __init__(self, api_key):
+    def __init__(self, api_key, allow_tracking=False):
         self.api_key = api_key
+        self.allow_tracking = allow_tracking
         self.token = None
 
     def connect(self):
@@ -59,12 +62,21 @@ class WebarchivSession:
             self._display_http_error(e)
 
     def _authenticate(self):
+        if self.allow_tracking:
+            from uuid import getnode as get_mac
+            mac = get_mac()
+            sha256 = hashlib.sha256()
+            sha256.update(str(mac).encode('utf-8'))
+            fingerprint = sha256.hexdigest()
+        else:
+            fingerprint = ''
+
         r = requests.post(self.base_url.format('authentication'),
                           data='''{{
                               "apikey": "{api_key}",
-                              "fingerprint": "string",
+                              "fingerprint": "{fingerprint}",
                               "version": "{version}"
-                          }}'''.format(api_key=self.api_key, version=self.version),
+                          }}'''.format(api_key=self.api_key, version=self.version, fingerprint=fingerprint),
                           headers={
                               'content-type': 'application/json',
                               'accept': 'application/ld+json'