diff --git a/pip_packages_requirement.txt b/pip_packages_requirement.txt
index ea25a8f8..d8a8a5a7 100644
--- a/pip_packages_requirement.txt
+++ b/pip_packages_requirement.txt
@@ -24,3 +24,6 @@ pybloomfiltermmap
 ipython
 flask
 texttable
+
+#Indexer requirements
+whoosh