diff --git a/overviewer_core/cache.py b/overviewer_core/cache.py
index 824b772..abcd336 100644
--- a/overviewer_core/cache.py
+++ b/overviewer_core/cache.py
@@ -20,8 +20,6 @@ Each cache class should implement the standard container type interface
 attribute.
 
 """
-import functools
-import logging
 
 class LRUCache(object):
     """A simple, generic, in-memory LRU cache that implements the standard
diff --git a/overviewer_core/dispatcher.py b/overviewer_core/dispatcher.py
index cfb3faa..a56f7f5 100644
--- a/overviewer_core/dispatcher.py
+++ b/overviewer_core/dispatcher.py
@@ -16,7 +16,6 @@
 import util
 import multiprocessing
 import multiprocessing.managers
-import cPickle as pickle
 import Queue
 import time
 from signals import Signal
diff --git a/overviewer_core/optimizeimages.py b/overviewer_core/optimizeimages.py
index 30b1ecd..481b3bb 100644
--- a/overviewer_core/optimizeimages.py
+++ b/overviewer_core/optimizeimages.py
@@ -15,8 +15,6 @@
 
 import os
 import subprocess
-import shlex
-import logging
 
 
 class Optimizer:
diff --git a/overviewer_core/settingsValidators.py b/overviewer_core/settingsValidators.py
index 2b3d28f..5f36468 100644
--- a/overviewer_core/settingsValidators.py
+++ b/overviewer_core/settingsValidators.py
@@ -1,7 +1,6 @@
 # see settingsDefinition.py
 import os
 import os.path
-from collections import namedtuple
 
 import rendermodes
 import util