diff --git a/contrib/blender/common.py b/contrib/blender/common.py
index e37749828..fe4924b3f 100644
--- a/contrib/blender/common.py
+++ b/contrib/blender/common.py
@@ -1,5 +1,4 @@
 import bpy
-import materials_utils
 
 def loadMesh(file):
 
diff --git a/contrib/dem-blend/dem-blend.py b/contrib/dem-blend/dem-blend.py
index 6403c444a..17752504b 100755
--- a/contrib/dem-blend/dem-blend.py
+++ b/contrib/dem-blend/dem-blend.py
@@ -8,7 +8,6 @@
 sys.path.insert(0, os.path.join("..", "..", os.path.dirname(__file__)))
 
 import argparse
-import multiprocessing
 from opendm.dem import merge
 
 parser = argparse.ArgumentParser(description='Merge and blend DEMs using OpenDroneMap\'s approach.')
diff --git a/contrib/mask-duplicator/mask-duplicator.py b/contrib/mask-duplicator/mask-duplicator.py
index 5580c994e..34c0e7f4d 100644
--- a/contrib/mask-duplicator/mask-duplicator.py
+++ b/contrib/mask-duplicator/mask-duplicator.py
@@ -4,7 +4,7 @@
 
 import PIL
 
-from PIL import Image, ExifTags
+from PIL import Image
 
 import shutil
 
diff --git a/contrib/orthorectify/orthorectify.py b/contrib/orthorectify/orthorectify.py
index 548fc1e0e..9f0ee753a 100755
--- a/contrib/orthorectify/orthorectify.py
+++ b/contrib/orthorectify/orthorectify.py
@@ -12,7 +12,6 @@
 import numpy.ma as ma
 import multiprocessing
 import argparse
-import functools
 from skimage.draw import line
 from opensfm import dataset