diff --git a/appengine/flexible/twilio/requirements.txt b/appengine/flexible/twilio/requirements.txt
index 8e25d96f66d..30fcede1595 100644
--- a/appengine/flexible/twilio/requirements.txt
+++ b/appengine/flexible/twilio/requirements.txt
@@ -1,3 +1,3 @@
 Flask==1.1.2
 gunicorn==20.0.4
-twilio==6.39.0
+twilio==6.40.0