diff --git a/pythonkuma/decorator.py b/pythonkuma/decorator.py
index 3c4a59e..5066df8 100644
--- a/pythonkuma/decorator.py
+++ b/pythonkuma/decorator.py
@@ -23,8 +23,8 @@ def decorator(func):
         async def wrapper(*args, **kwargs):
             """Wrapper"""
             client: UptimeKuma = args[0]
-            url = f"{client._base_url}{api_path}"
-            LOGGER.debug("Requesting %s", url)
+            url = client._base_url / api_path
+            LOGGER.debug("Requesting %s", url.human_repr())
             try:
                 request = await client._session.request(
                     method=method,
diff --git a/pythonkuma/uptimekuma.py b/pythonkuma/uptimekuma.py
index 3d60407..4d0dd2f 100644
--- a/pythonkuma/uptimekuma.py
+++ b/pythonkuma/uptimekuma.py
@@ -1,6 +1,7 @@
 """Uptime Kuma client."""
 
 from aiohttp import ClientSession
+from yarl import URL
 
 from .decorator import api_request
 from .models import UptimeKumaApiResponse
@@ -9,14 +10,14 @@
 class UptimeKuma:
     """This class is used to get information from Uptime Kuma."""
 
-    def __init__(self, session: ClientSession, base_url: str, username: str, password: str) -> None:
+    def __init__(self, session: ClientSession, base_url: URL | str, username: str, password: str) -> None:
         """Initialize"""
         self.monitors = []
-        self._base_url = base_url
+        self._base_url = base_url if isinstance(base_url, URL) else URL(base_url)
         self._username = username
         self._password = password
         self._session: ClientSession = session
 
-    @api_request("/metrics")
+    @api_request("metrics")
     async def async_get_monitors(self, **kwargs) -> UptimeKumaApiResponse:
         """Get monitors from API."""