diff --git a/requirements_client.txt b/requirements_client.txt
index e2c5ae880..ed19d9b38 100644
--- a/requirements_client.txt
+++ b/requirements_client.txt
@@ -1,5 +1,5 @@
 numpy==1.15.0
-PyYAML==5.1
+PyYAML==5.4
 requests==2.23
 msgpack-numpy==0.4.5
 pyzmq==19.0.0