diff --git a/action.yml b/action.yml
index 70b4fe9c..30fc4bea 100644
--- a/action.yml
+++ b/action.yml
@@ -4,19 +4,28 @@ author: 'deepakputhraya'
 inputs:
   regex:
     description: 'Regex to validate the pull request title'
+    required: false
     default: '.+'
   allowed_prefixes:
     description: 'Comma separated list of prefix allowed to be used in title. eg: feature,hotfix,JIRA-'
+    required: false
+    default: ''
+  disallowed_prefixes:
+    description: 'Comma separated list of prefix disallowed to be used in title. eg: feat,fix'
+    required: false
     default: ''
   prefix_case_sensitive:
-    description: 'Are the allowed prefixes case sensitive?'
-    default: false
+    description: 'Are the allowed & disallowed prefixes case sensitive?'
+    required: false
+    default: 'false'
   min_length:
     description: 'Min length of title'
-    default: 1
+    required: false
+    default: '1'
   max_length:
     description: 'Max length of title. -1 to ignore the rule'
-    default: -1
+    required: false
+    default: '-1'
 
 runs:
   using: 'node12'
diff --git a/index.js b/index.js
index 5d502849..fd20eb50 100644
--- a/index.js
+++ b/index.js
@@ -22,9 +22,9 @@ async function run() {
 
         const title = github.context.payload.pull_request.title;
         core.info(`Pull Request title: "${title}"`);
+
         // Check if title pass regex
         const regex = RegExp(core.getInput('regex'));
-        core.info(`Regex: ${regex}`);
         if (!regex.test(title)) {
             core.setFailed(`Pull Request title "${title}" failed to pass match regex - ${regex}`);
             return
@@ -44,8 +44,8 @@ async function run() {
             return
         }
 
-        // Check if title starts with a prefix
-        const prefixes = core.getInput('allowed_prefixes');
+        // Check if title starts with an allowed prefix
+        let prefixes = core.getInput('allowed_prefixes');
         const prefixCaseSensitive = (core.getInput('prefix_case_sensitive') === 'true');
         core.info(`Allowed Prefixes: ${prefixes}`);
         if (prefixes.length > 0 && !prefixes.split(',').some((el) => validateTitlePrefix(title, el, prefixCaseSensitive))) {
@@ -53,6 +53,14 @@ async function run() {
             return
         }
 
+        // Check if title starts with a disallowed prefix
+        prefixes = core.getInput('disallowed_prefixes');
+        core.info(`Disallowed Prefixes: ${prefixes}`);
+        if (prefixes.length > 0 && prefixes.split(',').some((el) => validateTitlePrefix(title, el, prefixCaseSensitive))) {
+            core.setFailed(`Pull Request title "${title}" matched with a disallowed prefix - ${prefixes}`);
+            return
+        }
+
     } catch (error) {
         core.setFailed(error.message);
     }