diff --git a/dlib/auth/oidc.py b/dlib/auth/oidc.py
index 62b4af1..50f3de8 100644
--- a/dlib/auth/oidc.py
+++ b/dlib/auth/oidc.py
@@ -1,8 +1,8 @@
 from __future__ import annotations
 
 import time
-from functools import cached_property
 from typing import Any
+from urllib.parse import urlparse, urlunparse
 
 import httpx
 from jose import JWTError, jwt
@@ -24,10 +24,22 @@ class TokenValidationError(Exception):
 def _normalize_issuer(value: str | None) -> str | None:
     if not value:
         return None
-    normalized = value.strip().rstrip("/")
-    normalized = normalized.replace("/application/o/authorize/", "/application/o/")
-    normalized = normalized.replace("/application/o/authorize", "/application/o")
-    normalized = normalized.replace("//application", "/application")
+    parsed = urlparse(value.strip())
+    path = parsed.path.rstrip("/")
+    if not path:
+        return urlunparse((parsed.scheme, parsed.netloc, "", "", "", ""))
+    segments = [segment for segment in path.split("/") if segment]
+    if (
+        len(segments) >= 4
+        and segments[0] == "application"
+        and segments[1] == "o"
+        and segments[2] == "authorize"
+    ):
+        segments.pop(2)
+    normalized_path = "/" + "/".join(segments)
+    normalized = urlunparse(
+        (parsed.scheme, parsed.netloc, normalized_path.rstrip("/"), "", "", "")
+    )
     return normalized.rstrip("/")