diff --git a/requirements.txt b/requirements.txt
index a2552f03a..3a723866c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,3 +28,4 @@ wsgiref==0.1.2
 zope.interface==4.1.3
 base58==0.2.2
 googlefinance==0.7
+pyyaml==3.12
\ No newline at end of file