diff --git a/hera_corr_f/control_software/casperfpga/requirements.txt b/hera_corr_f/control_software/casperfpga/requirements.txt
index d4c873b..be1d63e 100644
--- a/hera_corr_f/control_software/casperfpga/requirements.txt
+++ b/hera_corr_f/control_software/casperfpga/requirements.txt
@@ -40,7 +40,7 @@ Pygments==2.2.0
 pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.2
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 scandir==1.5
 simplegeneric==0.8.1