diff --git a/requirements.txt b/requirements.txt
index e3c4762dd8864bb814cc45813f7664693ddfbfde..15b3788464fb338a3b7f011565b3cc3d7df5c61f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,7 @@ chardet==3.0.4
 coverage==4.0.3
 cryptography==2.3
 cssselect2==0.2.1
+dataclasses==0.6
 decorator==4.3.0
 defusedxml==0.5.0
 dj-database-url==0.4.2