diff --git a/requirements.txt b/requirements.txt
index df31d0a..7144337 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 Flask==0.12.2
 google-cloud-datastore==1.2.0
 gunicorn==19.7.1
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.2
 simplejson==3.11.1
 python-telegram-bot==7.0.1