diff --git a/Build_Sentiment_Analysis_Flask_Web_App/AI_App/requirements.txt b/Build_Sentiment_Analysis_Flask_Web_App/AI_App/requirements.txt
index 3f8cddf..a36090a 100644
--- a/Build_Sentiment_Analysis_Flask_Web_App/AI_App/requirements.txt
+++ b/Build_Sentiment_Analysis_Flask_Web_App/AI_App/requirements.txt
@@ -24,7 +24,7 @@ notebook==5.7.8
 numpy==1.17.0
 pandas==0.25.0
 python-dateutil==2.8.0
-PyYAML==5.1.1
+PyYAML==5.4
 scikit-learn==0.21.2
 scipy==1.3.1
 tensorboard==1.14.0