diff --git a/API/requirements.txt b/API/requirements.txt
index 1d08b67..52e8127 100644
--- a/API/requirements.txt
+++ b/API/requirements.txt
@@ -11,7 +11,7 @@ MarkupSafe==1.1.1
 Naked==0.1.31
 pkg-resources==0.0.0
 pycrypto==2.6.1
-PyYAML==5.1.1
+PyYAML==5.4
 requests==2.22.0
 shellescape==3.4.1
 soupsieve==1.9.1