diff --git a/.github/workflows/lock.yml b/.github/workflows/lock.yml
index 147baad..78132ff 100644
--- a/.github/workflows/lock.yml
+++ b/.github/workflows/lock.yml
@@ -12,4 +12,4 @@ jobs:
               with:
                   github-token: ${{ secrets.GITHUB_TOKEN }}
                   number: ${{ github.event.pull_request.number }}
-                  lock_reason: resolved
+                  lock-reason: resolved
diff --git a/README.md b/README.md
index 968550d..e7b9811 100644
--- a/README.md
+++ b/README.md
@@ -10,5 +10,5 @@ This action locks a pull-request
     with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         number: ${{ github.event.pull_request.number }}
-        lock_reason: resolved
+        lock-reason: resolved
 ```
diff --git a/action.yml b/action.yml
index bd26e7c..6e7452a 100644
--- a/action.yml
+++ b/action.yml
@@ -8,7 +8,7 @@ inputs:
     number:
         description: "Pull Request number"
         required: true
-    lock_reason:
+    lock-reason:
         description: "The lock reason: off-topic,too heated,resolved,spam"
         default: "resolved"
 branding: