diff --git a/requirements.txt b/requirements.txt
index d67ce05..b556f00 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ MarkupSafe==1.1.1
 numpy==1.16.2
 protobuf==3.7.0
 PyAudio==0.2.11
-PyYAML==5.1
+PyYAML==5.4
 requests==2.21.0
 six==1.12.0
 slackclient==1.3.1