diff --git a/tutorials/01_preparations.ipynb b/tutorials/01_preparations.ipynb
index 1afc952..6c6e6f4 100644
--- a/tutorials/01_preparations.ipynb
+++ b/tutorials/01_preparations.ipynb
@@ -27,7 +27,7 @@
    "source": [
     "lnbits_admin_key = \"\" #TODO set your key here\n",
     "lnbits_wallet_id = \"\" #TODO set your key here\n",
-    "lnbits_host= \"https://demo.lnbits.com\" #TODO use demo.lnbits.com, but rather use your own instance\n",
+    "lnbits_host= \"https://demo.lnbits.com\" #TODO you can use demo.lnbits.com, but rather use your own instance\n",
     "nostdress_domain = \"nostrdvm.com\" #TODO use your own nostdress instance, or use the default one"
    ],
    "id": "2e71e7aa2ebdac50"
diff --git a/tutorials/03_client.py b/tutorials/03_client.py
index eba8b22..96f6944 100644
--- a/tutorials/03_client.py
+++ b/tutorials/03_client.py
@@ -126,5 +126,5 @@ if __name__ == '__main__':
         raise FileNotFoundError(f'.env file not found at {env_path} ')
 
     # Replace this key with the one from your DVM from part 3.
-    target_dvm_npub = "9937b858d8482610d67957778a62e2617260952c192579a7c7859bf18f86baf1"
+    target_dvm_npub = "aaf3b2bda1f19651417af4b1ccc35ebb6675d718843fdc444bdca4da1c8cd2fc"
     asyncio.run(nostr_client(target_dvm_npub))
diff --git a/tutorials/helper.py b/tutorials/helper.py
deleted file mode 100644
index 40c4677..0000000
--- a/tutorials/helper.py
+++ /dev/null
@@ -1,5 +0,0 @@
-import random, string
-
-def randomword(length):
-   letters = string.ascii_lowercase
-   return ''.join(random.choice(letters) for i in range(length))
\ No newline at end of file