diff --git a/README.md b/README.md
index 9d98291..6671543 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # create_listmonk_campaign
 
-create a listmonk campaign if the name of the branch being merged includes "post_XXXXXX"
+create a listmonk campaign if the name of the branch being merged includes "___post___XXXXXX"
diff --git a/action.sh b/action.sh
index 62a6ba9..8e6fd24 100755
--- a/action.sh
+++ b/action.sh
@@ -1 +1,7 @@
-echo $(git rev-parse --abbrev-ref HEAD)
+#!/bin/bash
+commit_subject=$(git log -1 --pretty=format:%s)
+
+regex='Merge pull request #[0-9]+ from .+/(.+)$'
+[[ $commit_subject =~ $regex ]]
+branch_name=${BASH_REMATCH[1]}
+echo $branch_name
\ No newline at end of file
diff --git a/action.yaml b/action.yaml
index e4d0c41..090d115 100644
--- a/action.yaml
+++ b/action.yaml
@@ -1,5 +1,5 @@
 name: npm-publish
-description: "create a listmonk campaign if the name of the branch being merged includes \"post_XXXXXX\"."
+description: "create a listmonk campaign if the name of the branch being merged includes \"__post__XXXXXX\"."
 author: "Bryce Thorup"
 runs:
   using: "composite"