diff --git a/src/gitcloak/classes/markdown.py b/src/gitcloak/classes/markdown.py
index be8b621..cc8f059 100644
--- a/src/gitcloak/classes/markdown.py
+++ b/src/gitcloak/classes/markdown.py
@@ -1,19 +1,49 @@
 import re
 import markdown2
 
+
 class RelativeURLRewriter(markdown2.Markdown):
+    """A Markdown postprocessor that rewrites relative URLs to match the raw file URL."""
+
     def __init__(self, base_url, *args, **kwargs):
+        """Initialize the RelativeURLRewriter.
+
+        Args:
+            base_url (str): The base URL to prepend to relative URLs.
+        """
         self.base_url = base_url
         super().__init__(*args, **kwargs)
 
-    def postprocess(self, text):
-        # Rewrite relative URLs
+    def postprocess(self, text: str) -> str:
+        """Rewrite relative URLs in the Markdown text.
+
+        Args:
+            text (str): The Markdown text.
+
+        Returns:
+            str: The Markdown text with relative URLs rewritten.
+        """
+
         def replace_url(match):
+            """A subfunction to replace the URL in a found match.
+
+            Args:
+                match (re.Match): The match object.
+
+            Returns:
+                str: The replacement string, either the original URL or the rewritten URL.
+            """
+
             url = match.group(1)
-            if not (":" in url or url.startswith("/") or url.startswith("#") or url.startswith("md5-")):
+            if not (
+                ":" in url
+                or url.startswith("/")
+                or url.startswith("#")
+                or url.startswith("md5-")
+            ):
                 return f'src="{self.base_url}/{url}"'
             return match.group(0)
 
         text = re.sub(r'src="([^"]+)"', replace_url, text)
         text = re.sub(r'href="([^"]+)"', replace_url, text)
-        return text
\ No newline at end of file
+        return text