diff --git a/requirements.txt b/requirements.txt
index a12df5b..e034d47 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 Flask==1.0
 numpy==1.16.3
 pymongo==3.4.0
-pyyaml==3.13
+pyyaml==5.4
 pytest==3.8.2
 requests==2.19
 scipy==1.2.1