diff --git a/action.yml b/action.yml
index 5ef4fa7..e3c5ae8 100644
--- a/action.yml
+++ b/action.yml
@@ -6,7 +6,7 @@ inputs:
   python-version:
     description: "Version range or exact version of a Python version to use, using SemVer's version range syntax."
     default: "3.x"
-    required: true
+    required: false
   architecture:
     description: "The target architecture (x86, x64) of the Python interpreter."
     required: false
@@ -37,6 +37,9 @@ inputs:
     description: "The dependency file(s) to cache."
     default: "pdm.lock"
     required: false
+  update-python:
+    description: "Whether to update the environment with the requested Python"
+    default: "true"
 outputs:
   python-version:
     description: "The installed Python or PyPy version. Useful when given a version range as input."
diff --git a/dist/setup-pdm.js b/dist/setup-pdm.js
index a097bc2..d1c9a01 100644
--- a/dist/setup-pdm.js
+++ b/dist/setup-pdm.js
@@ -77514,13 +77514,13 @@ async function fetchUrlAsBuffer(url) {
   }
   return Buffer.from(response.body);
 }
-async function findPythonVersion(version, architecture, allowPreReleases) {
+async function findPythonVersion(version, architecture, allowPreReleases, updateEnvironment = true) {
   let pythonVersion = "";
   if (isPyPyVersion(version)) {
     const installed = await findPyPyVersion(
       version,
       architecture,
-      true,
+      updateEnvironment,
       false,
       allowPreReleases
     );
@@ -77533,7 +77533,7 @@ async function findPythonVersion(version, architecture, allowPreReleases) {
     const installed = await useCpythonVersion(
       version,
       architecture,
-      true,
+      updateEnvironment,
       false,
       allowPreReleases
     );
@@ -77621,6 +77621,7 @@ async function run() {
   const arch2 = core8.getInput("architecture") || os4.arch();
   const pdmVersion = core8.getInput("version");
   const pythonVersion = core8.getInput("python-version");
+  const updateEnvironment = core8.getBooleanInput("update-python");
   const allowPythonPreReleases = core8.getBooleanInput("allow-python-prereleases");
   const cmdArgs = ["-"];
   if (core8.getBooleanInput("prerelease")) {
@@ -77640,7 +77641,7 @@ async function run() {
     if (core8.getBooleanInput("enable-pep582")) {
       core8.exportVariable("PYTHONPATH", getPep582Path(installOutput.install_location, installOutput.install_python_version));
     }
-    const installedPython = await findPythonVersion(pythonVersion, arch2, allowPythonPreReleases);
+    const installedPython = await findPythonVersion(pythonVersion, arch2, allowPythonPreReleases, updateEnvironment);
     if (process.platform === "linux") {
       core8.exportVariable("LD_PRELOAD", "/lib/x86_64-linux-gnu/libgcc_s.so.1");
     }
diff --git a/src/setup-pdm.ts b/src/setup-pdm.ts
index fc0145c..a49934e 100644
--- a/src/setup-pdm.ts
+++ b/src/setup-pdm.ts
@@ -29,6 +29,7 @@ async function run(): Promise<void> {
   const arch = core.getInput('architecture') || os.arch();
   const pdmVersion = core.getInput('version');
   const pythonVersion = core.getInput('python-version');
+  const updateEnvironment = core.getBooleanInput('update-python');
   const allowPythonPreReleases = core.getBooleanInput('allow-python-prereleases');
   const cmdArgs = ['-'];
   if (core.getBooleanInput('prerelease')) {
@@ -50,7 +51,7 @@ async function run(): Promise<void> {
       core.exportVariable('PYTHONPATH', getPep582Path(installOutput.install_location, installOutput.install_python_version));
     }
 
-    const installedPython = await utils.findPythonVersion(pythonVersion, arch, allowPythonPreReleases);
+    const installedPython = await utils.findPythonVersion(pythonVersion, arch, allowPythonPreReleases, updateEnvironment);
 
     if (process.platform === 'linux') {
       // See https://github.com/actions/virtual-environments/issues/2803
diff --git a/src/utils.ts b/src/utils.ts
index 38a350c..32e5a95 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -20,13 +20,13 @@ export async function fetchUrlAsBuffer(url: string): Promise<Buffer> {
 }
 
 
-export async function findPythonVersion(version: string, architecture: string, allowPreReleases: boolean): Promise<string> {
+export async function findPythonVersion(version: string, architecture: string, allowPreReleases: boolean, updateEnvironment: boolean = true): Promise<string> {
   let pythonVersion = '';
   if (isPyPyVersion(version)) {
     const installed = await findPyPyVersion(
       version,
       architecture,
-      true,
+      updateEnvironment,
       false,
       allowPreReleases
     );
@@ -39,7 +39,7 @@ export async function findPythonVersion(version: string, architecture: string, a
     const installed = await useCpythonVersion(
       version,
       architecture,
-      true,
+      updateEnvironment,
       false,
       allowPreReleases
     );