diff --git a/terraform/action.yml b/terraform/action.yml
index 6e67eee..de14761 100644
--- a/terraform/action.yml
+++ b/terraform/action.yml
@@ -46,7 +46,7 @@ inputs:
     description: "Allows to enable plan result direct apply"
     required: false
     default: "false"
-  target-branch:
+  target_branch:
     description: 'The name of target branch to merge'
     required: false
     default: "master"
@@ -63,8 +63,8 @@ runs:
       uses: devmasx/merge-branch@master
       with:
         type: now
-        target-branch: ${{ inputs.target-branch }}
-        github-token: ${{ inputs.github-token }}
+        target_branch: ${{ inputs.target_branch }}
+        github_token: ${{ inputs.github_token }}
 
     - uses: marceloprado/has-changed-path@v1
       id: changed