diff --git a/nlp/requirements.txt b/nlp/requirements.txt
index 7b8e643..449b88c 100644
--- a/nlp/requirements.txt
+++ b/nlp/requirements.txt
@@ -98,7 +98,7 @@ python-xapp==1.0.0
 pytz==2018.3
 PyWavelets==1.0.3
 pyxdg==0.25
-PyYAML==3.12
+PyYAML==5.4
 pyzmq==18.0.1
 qtconsole==4.4.3
 reportlab==3.4.0