diff --git a/Code/requirements-stable.txt b/Code/requirements-stable.txt
index f11b912..b10046c 100644
--- a/Code/requirements-stable.txt
+++ b/Code/requirements-stable.txt
@@ -16,7 +16,7 @@ nltk==3.4.5
 numpy==1.16.0
 protobuf==3.6.1
 pyparsing==2.3.1
-PyYAML==5.1
+PyYAML==5.4
 rdflib==4.2.2
 scikit-learn==0.20.2
 scipy==1.2.0