diff --git a/common/lib/capa/capa/responsetypes.py b/common/lib/capa/capa/responsetypes.py
index 0e4d23f572..8bbd4686c0 100644
--- a/common/lib/capa/capa/responsetypes.py
+++ b/common/lib/capa/capa/responsetypes.py
@@ -17,6 +17,7 @@ import random
 import re
 import requests
 import traceback
+import hashlib
 import abc
 import os
 import xml.sax.saxutils as saxutils