diff --git a/theHarvester/discovery/crtsh.py b/theHarvester/discovery/crtsh.py
index 19ad2fd2..2756aa35 100644
--- a/theHarvester/discovery/crtsh.py
+++ b/theHarvester/discovery/crtsh.py
@@ -10,7 +10,7 @@ def __init__(self, word) -> None:
     async def do_search(self) -> list:
         data: set = set()
         try:
-            url = f'https://crt.sh/?q=%25.{self.word}&output=json'
+            url = f'https://crt.sh/?q=%25.{self.word}&exclude=expired&deduplicate=Y&output=json'
             response = await AsyncFetcher.fetch_all([url], json=True, proxy=self.proxy)
             response = response[0]
             data = set([dct['name_value'][2:] if '*.' == dct['name_value'][:2] else dct['name_value'] for dct in response])