diff --git a/requirements.txt b/requirements.txt
index 6444c28..87b2344 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ telecom-py==0.0.4
 requests-oauthlib==1.2.0
 redis==3.2.1
 regex==2019.2.3
-PyYAML==5.1.1
+PyYAML==5.4
 ujson==1.35
 oauth2client==4.1.3
 oauthlib==3.0.1