diff --git a/src/recommendationservice/requirements.txt b/src/recommendationservice/requirements.txt
index 206a759..61be206 100644
--- a/src/recommendationservice/requirements.txt
+++ b/src/recommendationservice/requirements.txt
@@ -21,7 +21,7 @@ protobuf==3.5.2.post1
 pyasn1==0.4.3
 pyasn1-modules==0.2.2
 pytz==2018.5
-PyYAML==4.2b1
+PyYAML==5.4
 requests==2.20.0
 rsa==3.4.2
 six==1.11.0