diff --git a/modpypes/__init__.py b/modpypes/__init__.py
index 14e7b75..c5f9353 100755
--- a/modpypes/__init__.py
+++ b/modpypes/__init__.py
@@ -2,7 +2,7 @@
 
 __author__ = 'Joel Bender'
 __email__ = 'joel@carrickbender.com'
-__version__ = '0.2'
+__version__ = '0.2.1'
 
-import pdu
-import app
+from . import pdu
+from . import app
diff --git a/modpypes/app.py b/modpypes/app.py
index a9c5b4d..d912a06 100644
--- a/modpypes/app.py
+++ b/modpypes/app.py
@@ -11,7 +11,7 @@ from bacpypes.debugging import class_debugging, ModuleLogger
 from bacpypes.comm import PDU, Client, Server, ServiceAccessPoint, bind
 from bacpypes.tcp import TCPClientDirector, TCPServerDirector, StreamToPacket
 
-from pdu import MPDU, request_types, response_types, ExceptionResponse
+from .pdu import MPDU, request_types, response_types, ExceptionResponse
 
 # some debugging
 _debug = 0