diff --git a/requirements.lock.txt b/requirements.lock.txt
index 84cfc04..619afce 100644
--- a/requirements.lock.txt
+++ b/requirements.lock.txt
@@ -45,7 +45,7 @@ pyserial==2.6
 python-apt==0.9.3.12
 python-crontab==2.2.2
 python-dateutil==2.6.0
-PyYAML==3.12
+PyYAML==5.4
 requests==2.4.3
 RPi.GPIO==0.6.3
 RTIMULib==7.2.1