diff --git a/darkwater_640/I2C.py b/darkwater_640/I2C.py
index a45a21d..87fcee8 100644
--- a/darkwater_640/I2C.py
+++ b/darkwater_640/I2C.py
@@ -19,10 +19,10 @@
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
-import logging
-import subprocess
+import .logging
+import .subprocess
 
-import Platform as Platform
+import .Platform as Platform
 
 
 def reverseByteOrder(data):
@@ -93,7 +93,7 @@ class Device(object):
         self._address = address
         if i2c_interface is None:
             # Use pure python I2C interface if none is specified.
-            import smbus
+            import .smbus
             self._bus = smbus.SMBus(busnum)
         else:
             # Otherwise use the provided class to create an smbus interface.
diff --git a/darkwater_640/PCA9685.py b/darkwater_640/PCA9685.py
index f982701..f08a679 100644
--- a/darkwater_640/PCA9685.py
+++ b/darkwater_640/PCA9685.py
@@ -71,7 +71,7 @@ class PCA9685(object):
         """Initialize the PCA9685."""
         # Setup I2C interface for the device.
         if i2c is None:
-            import I2C as I2C
+            from .I2C import I2C as I2C
             i2c = I2C
         self._device = i2c.get_i2c_device(address, **kwargs)
         self.set_all_pwm(0, 0)