diff --git a/requirements.txt b/requirements.txt
index 8d8e06b..da5d29d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ ims-lti-py==0.5
 oauth2==1.5.211
 PyMySQL==0.5
 pymysql-sa==1.0
-PyYAML==3.10
+PyYAML==5.1
 SQLAlchemy==0.7.10
 alembic==0.7.4
 requests==2.18.4