diff --git a/bin/run-all-petstore b/bin/run-all-petstore
index 715287e1582..be5901e0697 100755
--- a/bin/run-all-petstore
+++ b/bin/run-all-petstore
@@ -1,4 +1,12 @@
 #!/bin/bash -e
+# this bash script will loop through all the .sh files under bin
+# execute the script and check the result (exit code) to see if
+# there's any error
+
+echo "IMPORTANT: this script should be run by the CI (e.g. Shippable) only. There's no need to run this script to update Petstore samples for all generators."
+echo "Please press CTRL+C to stop or the script will continue in 10 seconds."
+
+sleep 10
 
 for SCRIPT in ./bin/*.sh
 do