diff --git a/.gitignore b/.gitignore
index 8064a44..9662100 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
+.vscode
 __pycache__
 logins.js
\ No newline at end of file
diff --git a/README.md b/README.md
index 7efac83..315ca1a 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,11 @@ python bitwarden.py
 
 Then choose your Bitwarden json export (needs to be unencrypted :c ) and it will open a nice looking website presenting the duplicates in your browser.
 
+## Requirements
+
+- Python 3.7 at least
+- Modern browser (tested with Firefox 88 and Chrome 86)
+
 ## Demonstration
 
 ![Demonstration](https://i.imgur.com/PlXPOCT.png)
diff --git a/bitwarden.py b/bitwarden.py
index 0af5e80..85fd748 100644
--- a/bitwarden.py
+++ b/bitwarden.py
@@ -23,7 +23,7 @@
 
 # %% Get items and folders from file
 with open(filename, encoding="utf-8") as f:
-    data: dict[list[dict]] = json.load(f)
+    data = json.load(f)
     folders = data.get("folders", [])
     items = data.get("items", [])
 
@@ -42,7 +42,7 @@ def domains(entry):
     def transform(url):
         match = re.match(r"(\w+:\/\/)?([\w.]+)(\/?.*)", url)
         if match:
-            return ".".join(match.group(2).removeprefix("www.").split(".")[-2:])
+            return ".".join(match.group(2).split(".")[-2:])
         return ""
     return set(filter(None, (transform(uri.get("uri")) for uri in entry.get("uris", []))))