diff --git a/requirements.txt b/requirements.txt
index 501b028..728753f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+indexed.py==0.0.1
 numpy==1.16.4
 PyQt5==5.13.0
 PyQt5-sip==4.19.18