diff --git a/requirements.txt b/requirements.txt
index 4e35fb3..b19f980 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,5 @@ gunicorn
 requests
 python-dotenv
 dnspython
-cryptography
\ No newline at end of file
+cryptography
+datetime
\ No newline at end of file
diff --git a/tools.py b/tools.py
index 5d04b58..3e9457a 100644
--- a/tools.py
+++ b/tools.py
@@ -101,7 +101,7 @@ def check_ssl(domain: str):
 
         expiry_date = cert_obj.not_valid_after_utc
         # Check if expiry date is past
-        if expiry_date < datetime.datetime.now(tz=datetime.UTC):
+        if expiry_date < datetime.datetime.now(datetime.timezone.utc):
             returns["cert"]["expired"] = True
             returns["cert"]["valid"] = False