diff --git a/hcloud/helpers/descriptors.py b/hcloud/helpers/descriptors.py
index f4f05db8..3940c721 100644
--- a/hcloud/helpers/descriptors.py
+++ b/hcloud/helpers/descriptors.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-import arrow
+from dateutil.parser import isoparse
 
 
 class ISODateTime(object):
@@ -13,7 +13,5 @@ def __set__(self, obj, string_date):
         if string_date is None:
             self.val = None
         else:
-            try:
-                self.val = arrow.get(string_date).datetime
-            except arrow.parser.ParserError:
-                raise ValueError('invalid date format')
+            # 2016-01-30T23:50+00:00
+            self.val = isoparse(string_date)
diff --git a/requirements/base.txt b/requirements/base.txt
index 354b67d2..7b3d9e69 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,4 +1,3 @@
-arrow==0.12.1
 future==0.17.1
 python-dateutil==2.7.5
 recommonmark==0.4.0
diff --git a/tests/unit/volumes/test_client.py b/tests/unit/volumes/test_client.py
index 67cd9956..aff98a88 100644
--- a/tests/unit/volumes/test_client.py
+++ b/tests/unit/volumes/test_client.py
@@ -1,5 +1,5 @@
 import pytest
-import arrow
+from dateutil.parser import isoparse
 import mock
 
 from hcloud.actions.client import BoundAction
@@ -24,7 +24,7 @@ def test_bound_volume_init(self, volume_response):
         )
 
         assert bound_volume.id == 1
-        assert bound_volume.created == arrow.get("2016-01-30T23:50:11+00:00").datetime
+        assert bound_volume.created == isoparse("2016-01-30T23:50:11+00:00")
         assert bound_volume.name == "database-storage"
         assert bound_volume.server == 12
         assert bound_volume.size == 42