diff --git a/Readme.md b/Readme.md
index 5d1fb81..a763117 100644
--- a/Readme.md
+++ b/Readme.md
@@ -29,7 +29,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: shanegenschaw/pull-request-comment-trigger@v2.1.0
+      - uses: shanegenschaw/pull-request-comment-trigger@v2.2.0
         id: check
         with:
           trigger: '@deploy'
@@ -47,7 +47,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: shanegenschaw/pull-request-comment-trigger@v2.1.0
+      - uses: shanegenschaw/pull-request-comment-trigger@v2.2.0
         id: check
         with:
           trigger: '@deploy **'
@@ -66,8 +66,7 @@ And if you specify a reaction, you have to provide the `GITHUB_TOKEN` env vbl.
 
 | Input | Required? | Description |
 | ----- | --------- | ----------- |
-| trigger | Yes | The string to look for in pull-request descriptions and comments. For example "#build/android". |
-| prefix_only | No (default 'false') | If 'true', the trigger must match the start of the comment. |
+| trigger | Yes | The string to look for in pull-request descriptions and comments. The trigger should be placed at the beginning. For example "#build/android". |
 | reaction | No (default '') | If set, the specified emoji "reaction" is put on the comment to indicate that the trigger was detected. For example, "rocket". |
 | allow_arguments | No (default 'false') | If 'true', script looks for `**` markers that are considered as comment arguments. |
 
diff --git a/action.yml b/action.yml
index 84adb32..8eef2a3 100644
--- a/action.yml
+++ b/action.yml
@@ -8,10 +8,6 @@ inputs:
   trigger:
     description: 'The string to look for in pull-request descriptions and comments. For example "#build/android"'
     required: true
-  prefix_only:
-    description: If 'true', the trigger must match the start of the comment.
-    required: false
-    default: "false"
   allow_arguments:
     description: If 'true', the trigger can have arguments. Can be passed via "**".
     required: false
diff --git a/dist/index.js b/dist/index.js
index 14b2b4e..c47006a 100755
--- a/dist/index.js
+++ b/dist/index.js
@@ -15917,7 +15917,6 @@ async function run() {
     const { owner, repo } = context.repo;
 
 
-    const prefixOnly = core.getInput("prefix_only") === 'true';
     const allowArguments = core.getInput("allow_arguments") === 'true';
 
     let hasTrigger = body.startsWith(trigger);
@@ -15925,18 +15924,14 @@ async function run() {
     if (allowArguments) {
         let regexRawTrigger = trigger.replace(/\s\*{2}/g, ' [^\\s]+');
 
-        if (prefixOnly) {
-            regexRawTrigger = `^${regexRawTrigger}$`;
-        } else {
-            regexRawTrigger = `${regexRawTrigger}$`;
-        }
+        regexRawTrigger = `^${regexRawTrigger}$`;
 
         const regexTrigger = new RegExp(regexRawTrigger);
 
         hasTrigger = regexTrigger.test(body);
     }
 
-    if ((prefixOnly && !hasTrigger) || !hasTrigger) {
+    if (!hasTrigger) {
         core.setOutput("triggered", "false");
         return;
     }
diff --git a/index.js b/index.js
index 11616d2..18db723 100755
--- a/index.js
+++ b/index.js
@@ -33,7 +33,6 @@ async function run() {
     const { owner, repo } = context.repo;
 
 
-    const prefixOnly = core.getInput("prefix_only") === 'true';
     const allowArguments = core.getInput("allow_arguments") === 'true';
 
     let hasTrigger = body.startsWith(trigger);
@@ -41,18 +40,14 @@ async function run() {
     if (allowArguments) {
         let regexRawTrigger = trigger.replace(/\s\*{2}/g, ' [^\\s]+');
 
-        if (prefixOnly) {
-            regexRawTrigger = `^${regexRawTrigger}$`;
-        } else {
-            regexRawTrigger = `${regexRawTrigger}$`;
-        }
+        regexRawTrigger = `^${regexRawTrigger}$`;
 
         const regexTrigger = new RegExp(regexRawTrigger);
 
         hasTrigger = regexTrigger.test(body);
     }
 
-    if ((prefixOnly && !hasTrigger) || !hasTrigger) {
+    if (!hasTrigger) {
         core.setOutput("triggered", "false");
         return;
     }
diff --git a/package-lock.json b/package-lock.json
index 1b9833c..e6696f4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "pull-request-comment-trigger",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "pull-request-comment-trigger",
-      "version": "2.1.0",
+      "version": "2.2.0",
       "license": "ISC",
       "dependencies": {
         "@actions/core": "^1.10.0",
diff --git a/package.json b/package.json
index 39d8f92..90b10df 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pull-request-comment-trigger",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "description": "",
   "main": "dist/index.js",
   "scripts": {