diff --git a/pip_packages_requirement.txt b/pip_packages_requirement.txt
index 75d5d866..c369d7c4 100644
--- a/pip_packages_requirement.txt
+++ b/pip_packages_requirement.txt
@@ -26,6 +26,8 @@ ipython
 flask
 texttable
 
+#DomainClassifier
+DomainClassifier
 #Indexer requirements
 whoosh