diff --git a/Chapter04/Lie_to_me/requirements.txt b/Chapter04/Lie_to_me/requirements.txt
index a6ed908..be7e8b9 100644
--- a/Chapter04/Lie_to_me/requirements.txt
+++ b/Chapter04/Lie_to_me/requirements.txt
@@ -42,6 +42,6 @@ six==1.11.0
 sklearn
 traitlets==4.3.2
 wcwidth==0.1.7
-websockets==4.0.1
+websockets==5.0
 Werkzeug==0.14.1
 wrapt==1.10.11