diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 9501e089..509887c5 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -18,6 +18,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: ./
       with:
+        webhook-url: ${{ secrets.SLACK_WEBHOOK_URL }}
         status: ${{ github.event.workflow_run.conclusion }}
         channel: '#actions'
         config: .github/slack-workflow.yml
diff --git a/README.md b/README.md
index a0b17a04..34472a6b 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,10 @@ when using a Slack App):
 
 ### Input Parameters (`with`)
 
+#### `webhook-url` (optional)
+
+Only required if the `SLACK_WEBHOOK_URL` environment variable is not set.
+
 #### `status` (required)
 
 The `status` must be defined. It can either be the current job status
diff --git a/action.yml b/action.yml
index 773a7139..70bb2f5b 100644
--- a/action.yml
+++ b/action.yml
@@ -2,12 +2,15 @@ name: slack - GitHub Actions Slack integration
 description: Notify Slack of GitHub Actions workflows, jobs and step status.
 author: satterly
 inputs:
+  webhook-url:
+    description: Specify Slack Incoming Webhook URL
+    required: false
   config:
     description: Configuration file
     required: false
     default: .github/slack.yml
   status:
-    description: Specify success, failure, cancelled or a custom status.
+    description: Specify success, failure, cancelled or a custom status
     required: true
   steps:
     description: Report on the status of individual steps
diff --git a/package.json b/package.json
index 37bb21a2..ebf0e666 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "build": "tsc",
     "format": "prettier --write '**/*.ts'",
-    "format-check": "prettier --check '**/*.ts'",
+    "format-check": "prettier --check --loglevel debug '**/*.ts'",
     "lint": "eslint src/**/*.ts",
     "lint:fix": "eslint --fix src/**/*.ts",
     "package": "ncc build --source-map --license licenses.txt",
diff --git a/src/main.ts b/src/main.ts
index 5710592f..a66ed698 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -25,7 +25,7 @@ async function run(): Promise<void> {
     }
     core.debug(yaml.dump(config))
 
-    const url = process.env.SLACK_WEBHOOK_URL as string
+    const url = core.getInput('webhook-url', {required: false}) || (process.env.SLACK_WEBHOOK_URL as string)
     const jobName = process.env.GITHUB_JOB as string
     const jobStatus = core.getInput('status', {required: true}).toUpperCase()
     const jobSteps = JSON.parse(core.getInput('steps', {required: false}) || '{}')
@@ -36,9 +36,9 @@ async function run(): Promise<void> {
 
     if (url) {
       await send(url, jobName, jobStatus, jobSteps, channel, message, config)
-      core.debug('Sent to Slack.')
+      core.info(`Sent ${jobName} status of ${jobStatus} to Slack!`)
     } else {
-      core.info('No "SLACK_WEBHOOK_URL" secret configured. Skip.')
+      core.warning('No "SLACK_WEBHOOK_URL"s secret or "webhook-url" input configured. Skip.')
     }
   } catch (error) {
     if (error instanceof Error) core.setFailed(error.message)