diff --git a/code/python/requirements.txt b/code/python/requirements.txt
index 54c3615..9116c6b 100644
--- a/code/python/requirements.txt
+++ b/code/python/requirements.txt
@@ -2,3 +2,4 @@
 pyobjc==4.1  # Latest version as of 2017-12-06
 xattr==0.6.4
 pyOpenSSL==17.5.0
+readline==6.2.4.1