diff --git a/samples/appengine/flexible/tasks/requirements.txt b/samples/appengine/flexible/tasks/requirements.txt
index cc593baf..3b8f608f 100644
--- a/samples/appengine/flexible/tasks/requirements.txt
+++ b/samples/appengine/flexible/tasks/requirements.txt
@@ -1,4 +1,3 @@
 Flask==1.1.2
 gunicorn==20.0.4
 google-cloud-tasks==1.5.0
-googleapis-common-protos==1.51.0