diff --git a/README.md b/README.md
index b2255af..b04f30a 100644
--- a/README.md
+++ b/README.md
@@ -119,3 +119,7 @@ View our [Roadmap](https://github.com/distributedio/titan/projects)
 
 ## Release Note
 * 20.4.21: add support for rpop and rpoplpush
+this is step 2
+this is step 3
+this is step 4
+previous_step.modified_files=[README.md]
diff --git a/README.txt b/README.txt
new file mode 100644
index 0000000..888e1ec
--- /dev/null
+++ b/README.txt
@@ -0,0 +1 @@
+this is step 1
diff --git a/my-output.txt b/my-output.txt
new file mode 100644
index 0000000..257ae8e
--- /dev/null
+++ b/my-output.txt
@@ -0,0 +1 @@
+this is step 5