diff --git a/app/logging_config.py b/app/logging_config.py
index 9766009..2c3253c 100644
--- a/app/logging_config.py
+++ b/app/logging_config.py
@@ -1,26 +1,41 @@
 import json
 import logging
-from datetime import UTC, datetime
+from datetime import datetime, timezone
+from urllib.parse import urlsplit, urlunsplit
 
-_STANDARD = set(logging.makeLogRecord({}).__dict__) | {"message", "asctime"}
+
+SAFE_EXTRA = ("monitor_id", "url", "status", "http_status", "latency_ms", "error")
+
+
+def redact_url(value: str) -> str:
+    try:
+        parts = urlsplit(value)
+        host = parts.hostname or ""
+        if parts.port:
+            host = f"{host}:{parts.port}"
+        return urlunsplit((parts.scheme, host, parts.path, "", ""))
+    except (TypeError, ValueError):
+        return "[invalid-url]"
 
 
 class JsonFormatter(logging.Formatter):
     def format(self, record: logging.LogRecord) -> str:
         payload: dict[str, object] = {
-            "timestamp": datetime.now(UTC).isoformat(),
+            "timestamp": datetime.now(timezone.utc).isoformat(),
             "level": record.levelname,
+            "logger": record.name,
             "event": record.getMessage(),
         }
-        for key, value in record.__dict__.items():
-            if key not in _STANDARD and key not in {"args", "msg"}:
-                payload[key] = value
-        return json.dumps(payload, default=str, separators=(",", ":"))
+        for key in SAFE_EXTRA:
+            if hasattr(record, key):
+                value = getattr(record, key)
+                payload[key] = redact_url(str(value)) if key == "url" else value
+        return json.dumps(payload, separators=(",", ":"), default=str)
 
 
 def configure_logging(level: str) -> None:
     handler = logging.StreamHandler()
     handler.setFormatter(JsonFormatter())
     root = logging.getLogger()
-    root.handlers[:] = [handler]
+    root.handlers = [handler]
     root.setLevel(level.upper())