diff --git a/README.md b/README.md
index 2e6c2355d..64c3196d9 100644
--- a/README.md
+++ b/README.md
@@ -390,9 +390,9 @@ Disable coverage for these reasons:
 #### `php-version` (optional)
 
 - Specify the PHP version you want to set up.
-- Accepts a `string`. For example `'8.0'`.
-- Accepts `latest` to set up the latest stable PHP version.
+- Accepts a `string`. For example `'8.3'`.
 - Accepts `lowest` to set up the lowest supported PHP version.
+- Accepts `highest` or `latest` to set up the latest stable PHP version.
 - Accepts `nightly` to set up a nightly build from the master branch of PHP.
 - Accepts the format `d.x`, where `d` is the major version. For example `5.x`, `7.x` and `8.x`.  
 - See [PHP support](#tada-php-support) for the supported PHP versions.
diff --git a/dist/index.js b/dist/index.js
index 5544c284b..4973cbfa7 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1156,7 +1156,7 @@ async function getManifestURL() {
 exports.getManifestURL = getManifestURL;
 async function parseVersion(version) {
     switch (true) {
-        case /^(latest|lowest|nightly|\d+\.x)$/.test(version):
+        case /^(latest|lowest|highest|nightly|\d+\.x)$/.test(version):
             return JSON.parse((await fetch.fetch(await getManifestURL()))['data'])[version];
         default:
             switch (true) {
diff --git a/src/configs/php-versions.json b/src/configs/php-versions.json
index 8bb143069..67ee07ffd 100644
--- a/src/configs/php-versions.json
+++ b/src/configs/php-versions.json
@@ -1,5 +1,6 @@
 {
   "lowest": "8.1",
+  "highest": "8.3",
   "latest": "8.3",
   "nightly": "8.4",
   "5.x": "5.6",
diff --git a/src/utils.ts b/src/utils.ts
index a35fb339c..79c157d69 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -59,7 +59,7 @@ export async function getManifestURL(): Promise<string> {
  */
 export async function parseVersion(version: string): Promise<string> {
   switch (true) {
-    case /^(latest|lowest|nightly|\d+\.x)$/.test(version):
+    case /^(latest|lowest|highest|nightly|\d+\.x)$/.test(version):
       return JSON.parse((await fetch.fetch(await getManifestURL()))['data'])[
         version
       ];