diff --git a/tests/test_url.py b/tests/test_url.py
index 2252f24d..d9805c53 100644
--- a/tests/test_url.py
+++ b/tests/test_url.py
@@ -134,6 +134,7 @@ def test_returns_true_on_valid_public_url(address, public):
     'http://[2010:836B:4179::836B:4179',
     'http://2010:836B:4179::836B:4179',
     'http://2010:836B:4179::836B:4179:80/index.html',
+    'http://0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.', # ReDoS
 ])
 def test_returns_failed_validation_on_invalid_url(address):
     assert isinstance(url(address), ValidationFailure)
diff --git a/validators/url.py b/validators/url.py
index 37d946cb..77a8973f 100644
--- a/validators/url.py
+++ b/validators/url.py
@@ -70,10 +70,10 @@
     r")\]|"
     # host name
     r"(?:(?:(?:xn--[-]{0,2})|[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]-?)*"
-    r"[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]+)"
+    r"[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9])"
     # domain name
     r"(?:\.(?:(?:xn--[-]{0,2})|[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]-?)*"
-    r"[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]+)*"
+    r"[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9])*"
     # TLD identifier
     r"(?:\.(?:(?:xn--[-]{0,2}[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]{2,})|"
     r"[a-z\u00a1-\uffff\U00010000-\U0010ffff]{2,}))"