diff --git a/hbp_nrp_cle/requirements.txt b/hbp_nrp_cle/requirements.txt
old mode 100755
new mode 100644
index b8d07f5..b5eef30
--- a/hbp_nrp_cle/requirements.txt
+++ b/hbp_nrp_cle/requirements.txt
@@ -7,7 +7,7 @@ h5py==2.6.0
 lazyarray==0.3.2
 neo==0.5.2
 PyNN==0.9.4
-PyYAML==3.11
+PyYAML==5.4
 rospkg==1.0.38
 catkin_pkg==0.2.10
 progressbar2==3.34.0