diff --git a/utils/Sync/requirements.txt b/utils/Sync/requirements.txt
index bc05b987..eac62e6f 100644
--- a/utils/Sync/requirements.txt
+++ b/utils/Sync/requirements.txt
@@ -1,3 +1,4 @@
+cssselect==0.9.2
 lxml==3.6.1
 Markdown==2.6.6
 Pillow==3.3.0