diff --git a/test/appium/requirements.txt b/test/appium/requirements.txt
index 96e6e32241..9fa11dd9ec 100644
--- a/test/appium/requirements.txt
+++ b/test/appium/requirements.txt
@@ -35,7 +35,7 @@ pytest-forked==0.2
 pytest-xdist==1.22.2
 python-dateutil==2.7.3
 pytz==2018.4
-PyYAML==3.12
+PyYAML==4.1
 repoze.lru==0.7
 requests==2.20.1
 rlp==1.0.1