diff --git a/CHANGES.txt b/CHANGES.txt
index 9b39c3b3..998d0ea8 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,7 +1,8 @@
 Changes
 -------
-0.3.3a0 (XXXX-XX-XX)
+0.3.3 (2017-05-22)
 ^^^^^^^^^^^^^^^^^^
+* switch to PEP 440 version parser to support 'dev' versions
 
 0.3.2 (2017-05-22)
 ^^^^^^^^^^^^^^^^^^
diff --git a/aiobotocore/__init__.py b/aiobotocore/__init__.py
index 14364fed..5e035fd1 100644
--- a/aiobotocore/__init__.py
+++ b/aiobotocore/__init__.py
@@ -1,4 +1,4 @@
 from .session import get_session, AioSession
 
 __all__ = ['get_session', 'AioSession']
-__version__ = '0.3.3a0'
+__version__ = '0.3.3'
diff --git a/aiobotocore/endpoint.py b/aiobotocore/endpoint.py
index 6b559702..ea3a5377 100644
--- a/aiobotocore/endpoint.py
+++ b/aiobotocore/endpoint.py
@@ -13,12 +13,12 @@
 from botocore.hooks import first_non_none_response
 from botocore.utils import is_valid_endpoint_url
 from botocore.vendored.requests.structures import CaseInsensitiveDict
-from distutils.version import StrictVersion
+from packaging.version import parse as parse_version
 from multidict import MultiDict
 from urllib.parse import urlparse
 
 PY_35 = sys.version_info >= (3, 5)
-AIOHTTP_2 = StrictVersion(aiohttp.__version__) > StrictVersion('2.0.0')
+AIOHTTP_2 = parse_version(aiohttp.__version__) > parse_version('2.0.0')
 
 # Monkey patching: We need to insert the aiohttp exception equivalents
 # The only other way to do this would be to have another config file :(
diff --git a/setup.py b/setup.py
index e34dd572..48a0b1de 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 
 install_requires = ['botocore>=1.5.34, <=1.5.52', 'aiohttp>=2.0.4',
-                    'multidict>=2.1.4', 'wrapt>=1.10.10']
+                    'multidict>=2.1.4', 'wrapt>=1.10.10', 'packaging>=16.8']
 
 PY_VER = sys.version_info