diff --git a/src/wrappers/waifu2x_caffe.py b/src/wrappers/waifu2x_caffe.py
index b99fc80..efc684c 100755
--- a/src/wrappers/waifu2x_caffe.py
+++ b/src/wrappers/waifu2x_caffe.py
@@ -13,6 +13,7 @@ for waifu2x-caffe.
 # built-in imports
 import argparse
 import os
+import pathlib
 import shlex
 import subprocess
 import threading