diff --git a/requirements.txt b/requirements.txt
index edad634..facac13 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ mongoengine==0.8.7
 psycopg2==2.6.1
 pymongo==2.8
 pytz==2015.4
-PyYAML==3.11
+PyYAML==5.4
 rapidpro-python==1.1
 raven==5.7.2
 redis==2.10.3