diff --git a/.gitignore b/.gitignore
index a2050b8..4c2ceec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -159,4 +159,7 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-.idea/
\ No newline at end of file
+.idea/
+
+# Allows me to keep TMD files in my repository folder for testing without accidentally publishing them
+*.tmd
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index cbc78eb..856390a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ authors = [
 ]
 description = "A Wii-related library for Python"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: MIT License",
diff --git a/src/libWiiPy/commonkey.py b/src/libWiiPy/commonkey.py
deleted file mode 100644
index dc70b3f..0000000
--- a/src/libWiiPy/commonkey.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from .shared import hex_string_to_byte_array
-
-
-class CommonKey:
-    def __init__(self):
-        self.default_key = "ebe42a225e8593e448d9c5457381aaf7"
-        self.korean_key = "63b82bb4f4614e2e13f2fefbba4c9b7e"
-        self.vwii_key = "30bfc76e7c19afbb23163330ced7c28d"
-
-    def get_default_key(self):
-        return hex_string_to_byte_array(self.default_key)
-
-    def get_korean_key(self):
-        return hex_string_to_byte_array(self.korean_key)
-
-    def get_vwii_key(self):
-        return hex_string_to_byte_array(self.vwii_key)
diff --git a/src/libWiiPy/commonkeys.py b/src/libWiiPy/commonkeys.py
new file mode 100644
index 0000000..6b8687e
--- /dev/null
+++ b/src/libWiiPy/commonkeys.py
@@ -0,0 +1,20 @@
+# "commonkeys.py" from libWiiPy by NinjaCheetah
+
+default_key = 'ebe42a225e8593e448d9c5457381aaf7'
+korean_key = '63b82bb4f4614e2e13f2fefbba4c9b7e'
+vwii_key = '30bfc76e7c19afbb23163330ced7c28d'
+
+
+def get_default_key():
+    """Returns the regular Wii Common Key used to encrypt most content."""
+    return default_key
+
+
+def get_korean_key():
+    """Returns the Korean Wii Common Key used to encrypt Korean content."""
+    return korean_key
+
+
+def get_vwii_key():
+    """Returns the vWii Common Key used to encrypt vWii-specific content."""
+    return vwii_key
diff --git a/src/libWiiPy/tmd.py b/src/libWiiPy/tmd.py
index a34a2c1..e65615b 100644
--- a/src/libWiiPy/tmd.py
+++ b/src/libWiiPy/tmd.py
@@ -1,3 +1,6 @@
+# "tmd.py" from libWiiPy by NinjaCheetah
+# See https://wiibrew.org/wiki/Title_metadata for details about the TMD format
+
 import binascii
 from dataclasses import dataclass
 from typing import List
@@ -5,6 +8,7 @@ from typing import List
 
 @dataclass
 class ContentRecord:
+    """Creates a content record object that contains the details of a content contained in a title."""
     cid: int  # Content ID
     index: int  # Index in the list of contents
     content_type: int  # normal: 0x0001; dlc: 0x4001; shared: 0x8001
@@ -13,11 +17,12 @@ class ContentRecord:
 
 
 class TMD:
+    """Creates a TMD object that can be used to read all the data contained in a TMD."""
     def __init__(self, tmd):
         self.tmd = tmd
         self.sig_type: int
         self.sig: bytearray
-        self.issuer: bytearray  # Root-CA%08x-CP%08x
+        self.issuer: bytearray  # Follows the format "Root-CA%08x-CP%08x"
         self.version: bytearray  # This seems to always be 0 no matter what?
         self.ca_crl_version: int
         self.signer_crl_version: int