diff --git a/appengine/flexible/tasks/requirements.txt b/appengine/flexible/tasks/requirements.txt
index a6bc79120b8..0b4e4d5a72f 100644
--- a/appengine/flexible/tasks/requirements.txt
+++ b/appengine/flexible/tasks/requirements.txt
@@ -1,4 +1,4 @@
 Flask==1.1.1
 gunicorn==20.0.4
 google-cloud-tasks==1.5.0
-googleapis-common-protos==1.6.0
+googleapis-common-protos==1.51.0
diff --git a/tasks/requirements.txt b/tasks/requirements.txt
index aa50ce695fc..e5b2c431006 100644
--- a/tasks/requirements.txt
+++ b/tasks/requirements.txt
@@ -1,2 +1,2 @@
 google-cloud-tasks==1.5.0
-googleapis-common-protos==1.6.0
+googleapis-common-protos==1.51.0