diff --git a/.github/main.workflow b/.github/main.workflow
index 506e27a..8fddb9d 100644
--- a/.github/main.workflow
+++ b/.github/main.workflow
@@ -1,8 +1,12 @@
 workflow "Verify labels" {
-  on = "push"
-  resolves = "Verify"
+  on = "pull_request"
+  resolves = "VerifyLabels"
 }
 
-action "Verify" {
-  uses = "yogevbd/enforce-label-action@master"
+action "VerifyLabels" {
+  uses = "yogevbd/enforce-label-action@test"
+  secrets = ["GITHUB_TOKEN"]
+  env = {
+    VALID_LABELS = "bug,enhancement,feature"
+  }
 }
\ No newline at end of file
diff --git a/README.md b/README.md
index 2aa126e..62c4f3a 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,21 @@
 # Enforce PR label
 
 Enforce choosing label before merging PR. Usefull for generating automatic changelog and release notes with `github-release-notes`
+
+## Example usage
+Create `.github/main.workflow` containing:
+
+```
+workflow "Verify labels" {
+  on = "pull_request"
+  resolves = "VerifyLabels"
+}
+
+action "VerifyLabels" {
+  uses = "yogevbd/enforce-label-action@master"
+  secrets = ["GITHUB_TOKEN"]
+  env = {
+    VALID_LABELS = "bug,enhancement,feature"
+  }
+}
+```
\ No newline at end of file
diff --git a/lib/run.js b/lib/run.js
index e2b785c..af66ffc 100644
--- a/lib/run.js
+++ b/lib/run.js
@@ -1,8 +1,11 @@
 const request = require('./request')
 
-const { GITHUB_SHA, GITHUB_EVENT_PATH, GITHUB_TOKEN, GITHUB_WORKSPACE } = process.env
+const { GITHUB_SHA, GITHUB_EVENT_PATH, GITHUB_TOKEN } = process.env
 const event = require(GITHUB_EVENT_PATH)
-const { repository } = event
+const { repository, pull_request } = event
+const labels = pull_request.labels.map((l) => l.name);
+const validLabels = process.env.VALID_LABELS.split(',');
+
 const {
   owner: { login: owner }
 } = repository
@@ -16,7 +19,7 @@ const headers = {
   Authorization: `Bearer ${GITHUB_TOKEN}`,
   'User-Agent': 'enforce-label-action'
 }
-
+  
 async function createCheck() {
   const body = {
     name: checkName,
@@ -35,11 +38,16 @@ async function createCheck() {
 }
 
 function verifyLabel() {
+  let success = 0;
+  if (labels.some(l => validLabels.includes(l))) {
+    success = 1;
+  }
+
   return {
-    conclusion: 'success',
+    conclusion: success == 1 ? 'success' : 'failure',
     output: {
-      title: 'checkName',
-      summary: `${'errorCount'} error(s), ${'warningCount'} warning(s) found`
+      title: `Please add at least one valid label - ${validLabels}`,
+      summary: ``
     }
   }
 }
@@ -73,9 +81,9 @@ async function run() {
   const id = await createCheck()
   try {
     const { conclusion, output } = verifyLabel()
-    console.log(output.summary)
     await updateCheck(id, conclusion, output)
     if (conclusion === 'failure') {
+      console.log(conclusion)
       process.exit(78)
     }
   } catch (err) {