diff --git a/microblog_bench/scripts/requirements.txt b/microblog_bench/scripts/requirements.txt
index eceb504..f0f9075 100644
--- a/microblog_bench/scripts/requirements.txt
+++ b/microblog_bench/scripts/requirements.txt
@@ -9,7 +9,7 @@ Jinja2==2.11.1
 MarkupSafe==1.1.1
 pkg-resources==0.0.0
 psycopg2-binary==2.8.4
-PyYAML==5.3
+PyYAML==5.4
 requests==2.22.0
 six==1.14.0
 thrift==0.13.0