diff --git a/requirements.txt b/requirements.txt
index 2fce905..51184d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ bravado-core==5.17.0
 lima==0.5
 pytest==6.1.1
 pytimeparse==1.1.8
-PyYAML==5.3.1
+PyYAML==5.4
 Flask-SSLify==0.1.5
 Flask-Mail==0.9.1
 flask-session==0.3.2
\ No newline at end of file