diff --git a/airflow/providers/plexus/hooks/plexus.py b/airflow/providers/plexus/hooks/plexus.py
index 78b8e4454513c..21e8069077918 100644
--- a/airflow/providers/plexus/hooks/plexus.py
+++ b/airflow/providers/plexus/hooks/plexus.py
@@ -67,7 +67,7 @@ def _generate_token(self) -> Any:
     def token(self) -> Any:
         """Returns users token"""
         if self.__token is not None:
-            if arrow.get(self.__token_exp) <= arrow.now():
+            if not self.__token_exp or arrow.get(self.__token_exp) <= arrow.now():
                 self.__token = self._generate_token()
             return self.__token
         else:
diff --git a/setup.py b/setup.py
index 85237a1c1211d..da32c3f10ccb5 100644
--- a/setup.py
+++ b/setup.py
@@ -416,7 +416,7 @@ def get_sphinx_theme_version() -> str:
     'pinotdb>0.1.2,<1.0.0',
 ]
 plexus = [
-    'arrow>=0.16.0,<1.0.0',
+    'arrow>=0.16.0',
 ]
 postgres = [
     'psycopg2-binary>=2.7.4',