diff --git a/__tests__/setup-python.test.ts b/__tests__/setup-python.test.ts
index 5d68482b..940cb402 100644
--- a/__tests__/setup-python.test.ts
+++ b/__tests__/setup-python.test.ts
@@ -8,11 +8,10 @@ jest.mock('fs', () => {
   const actualFs = jest.requireActual('fs');
   return {
     ...actualFs,
-    copyFileSync: jest.fn(),
-    existsSync: jest.fn(),
-    mkdirSync: jest.fn(),
     promises: {
       access: jest.fn(),
+      mkdir: jest.fn(),
+      copyFile: jest.fn(),
       writeFile: jest.fn(),
       appendFile: jest.fn()
     }
@@ -21,7 +20,7 @@ jest.mock('fs', () => {
 jest.mock('@actions/core');
 jest.mock('../src/cache-distributions/cache-factory');
 
-const mockedFs = fs as jest.Mocked<typeof fs>;
+const mockedFsPromises = fs.promises as jest.Mocked<typeof fs.promises>;
 const mockedCore = core as jest.Mocked<typeof core>;
 const mockedGetCacheDistributor = getCacheDistributor as jest.Mock;
 
@@ -35,15 +34,25 @@ describe('cacheDependencies', () => {
 
     mockedCore.getInput.mockReturnValue('nested/deps.lock');
 
-    mockedFs.existsSync.mockImplementation((p: any) => {
+    // Simulate file exists by resolving access without error
+    mockedFsPromises.access.mockImplementation(async (p) => {
       const pathStr = typeof p === 'string' ? p : p.toString();
-      if (pathStr === '/github/action/nested/deps.lock') return true;
-      if (pathStr === '/github/workspace/nested') return false; // Simulate missing dir
-      return true;
+      if (pathStr === '/github/action/nested/deps.lock') {
+        return Promise.resolve();
+      }
+      // Simulate directory doesn't exist to test mkdir
+      if (pathStr === path.dirname('/github/workspace/nested/deps.lock')) {
+        return Promise.reject(new Error('no dir'));
+      }
+      return Promise.resolve();
     });
 
-    mockedFs.copyFileSync.mockImplementation(() => undefined);
-    mockedFs.mkdirSync.mockImplementation(() => undefined);
+    // Simulate mkdir success
+    mockedFsPromises.mkdir.mockResolvedValue(undefined);
+
+    // Simulate copyFile success
+    mockedFsPromises.copyFile.mockResolvedValue(undefined);
+
     mockedGetCacheDistributor.mockReturnValue({restoreCache: mockRestoreCache});
   });
 
@@ -53,11 +62,11 @@ describe('cacheDependencies', () => {
     const sourcePath = path.resolve('/github/action', 'nested/deps.lock');
     const targetPath = path.resolve('/github/workspace', 'nested/deps.lock');
 
-    expect(mockedFs.existsSync).toHaveBeenCalledWith(sourcePath);
-    expect(mockedFs.mkdirSync).toHaveBeenCalledWith(path.dirname(targetPath), {
+    expect(mockedFsPromises.access).toHaveBeenCalledWith(sourcePath, fs.constants.F_OK);
+    expect(mockedFsPromises.mkdir).toHaveBeenCalledWith(path.dirname(targetPath), {
       recursive: true
     });
-    expect(mockedFs.copyFileSync).toHaveBeenCalledWith(sourcePath, targetPath);
+    expect(mockedFsPromises.copyFile).toHaveBeenCalledWith(sourcePath, targetPath);
     expect(mockedCore.info).toHaveBeenCalledWith(
       `Copied ${sourcePath} to ${targetPath}`
     );
@@ -68,21 +77,21 @@ describe('cacheDependencies', () => {
   });
 
   it('warns if the dependency file does not exist', async () => {
-    mockedFs.existsSync.mockReturnValue(false);
+    // Simulate file does not exist by rejecting access
+    mockedFsPromises.access.mockRejectedValue(new Error('file not found'));
 
     await cacheDependencies('pip', '3.12');
 
     expect(mockedCore.warning).toHaveBeenCalledWith(
       expect.stringContaining('does not exist')
     );
-    expect(mockedFs.copyFileSync).not.toHaveBeenCalled();
+    expect(mockedFsPromises.copyFile).not.toHaveBeenCalled();
     expect(mockRestoreCache).toHaveBeenCalled();
   });
 
   it('warns if file copy fails', async () => {
-    mockedFs.copyFileSync.mockImplementation(() => {
-      throw new Error('copy failed');
-    });
+    // Simulate copyFile failure
+    mockedFsPromises.copyFile.mockRejectedValue(new Error('copy failed'));
 
     await cacheDependencies('pip', '3.12');
 
@@ -97,7 +106,7 @@ describe('cacheDependencies', () => {
 
     await cacheDependencies('pip', '3.12');
 
-    expect(mockedFs.copyFileSync).not.toHaveBeenCalled();
+    expect(mockedFsPromises.copyFile).not.toHaveBeenCalled();
     expect(mockedCore.warning).not.toHaveBeenCalled();
     expect(mockRestoreCache).toHaveBeenCalled();
   });
diff --git a/dist/setup/index.js b/dist/setup/index.js
index 854f9490..76ddee08 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -96931,26 +96931,28 @@ function cacheDependencies(cache, pythonVersion) {
             const sourcePath = path.resolve(actionPath, cacheDependencyPath);
             const relativePath = path.relative(actionPath, sourcePath);
             const targetPath = path.resolve(workspace, relativePath);
-            if (!fs_1.default.existsSync(sourcePath)) {
-                core.warning(`The resolved cache-dependency-path does not exist: ${sourcePath}`);
-            }
-            else {
-                if (sourcePath !== targetPath) {
-                    try {
-                        const targetDir = path.dirname(targetPath);
-                        if (!fs_1.default.existsSync(targetDir)) {
-                            fs_1.default.mkdirSync(targetDir, { recursive: true });
-                        }
-                        fs_1.default.copyFileSync(sourcePath, targetPath);
-                        core.info(`Copied ${sourcePath} to ${targetPath}`);
-                    }
-                    catch (error) {
-                        core.warning(`Failed to copy file from ${sourcePath} to ${targetPath}: ${error}`);
-                    }
+            try {
+                const sourceExists = yield fs_1.default.promises
+                    .access(sourcePath, fs_1.default.constants.F_OK)
+                    .then(() => true)
+                    .catch(() => false);
+                if (!sourceExists) {
+                    core.warning(`The resolved cache-dependency-path does not exist: ${sourcePath}`);
                 }
+                else if (sourcePath !== targetPath) {
+                    const targetDir = path.dirname(targetPath);
+                    // Create target directory if it doesn't exist
+                    yield fs_1.default.promises.mkdir(targetDir, { recursive: true });
+                    // Copy file asynchronously
+                    yield fs_1.default.promises.copyFile(sourcePath, targetPath);
+                    core.info(`Copied ${sourcePath} to ${targetPath}`);
+                }
+                resolvedDependencyPath = path.relative(workspace, targetPath);
+                core.info(`Resolved cache-dependency-path: ${resolvedDependencyPath}`);
+            }
+            catch (error) {
+                core.warning(`Failed to copy file from ${sourcePath} to ${targetPath}: ${error}`);
             }
-            resolvedDependencyPath = path.relative(workspace, targetPath);
-            core.info(`Resolved cache-dependency-path: ${resolvedDependencyPath}`);
         }
         const cacheDistributor = (0, cache_factory_1.getCacheDistributor)(cache, pythonVersion, cacheDependencyPath);
         yield cacheDistributor.restoreCache();
diff --git a/src/setup-python.ts b/src/setup-python.ts
index ed76469c..2895d885 100644
--- a/src/setup-python.ts
+++ b/src/setup-python.ts
@@ -21,7 +21,6 @@ function isPyPyVersion(versionSpec: string) {
 function isGraalPyVersion(versionSpec: string) {
   return versionSpec.startsWith('graalpy');
 }
-
 export async function cacheDependencies(cache: string, pythonVersion: string) {
   const cacheDependencyPath =
     core.getInput('cache-dependency-path') || undefined;
@@ -35,30 +34,34 @@ export async function cacheDependencies(cache: string, pythonVersion: string) {
     const relativePath = path.relative(actionPath, sourcePath);
     const targetPath = path.resolve(workspace, relativePath);
 
-    if (!fs.existsSync(sourcePath)) {
-      core.warning(
-        `The resolved cache-dependency-path does not exist: ${sourcePath}`
-      );
-    } else {
-      if (sourcePath !== targetPath) {
-        try {
-          const targetDir = path.dirname(targetPath);
-          if (!fs.existsSync(targetDir)) {
-            fs.mkdirSync(targetDir, {recursive: true});
-          }
+    try {
+      const sourceExists = await fs.promises
+        .access(sourcePath, fs.constants.F_OK)
+        .then(() => true)
+        .catch(() => false);
 
-          fs.copyFileSync(sourcePath, targetPath);
-          core.info(`Copied ${sourcePath} to ${targetPath}`);
-        } catch (error) {
-          core.warning(
-            `Failed to copy file from ${sourcePath} to ${targetPath}: ${error}`
-          );
-        }
+      if (!sourceExists) {
+        core.warning(
+          `The resolved cache-dependency-path does not exist: ${sourcePath}`
+        );
+      } else if (sourcePath !== targetPath) {
+        const targetDir = path.dirname(targetPath);
+
+        // Create target directory if it doesn't exist
+        await fs.promises.mkdir(targetDir, {recursive: true});
+
+        // Copy file asynchronously
+        await fs.promises.copyFile(sourcePath, targetPath);
+        core.info(`Copied ${sourcePath} to ${targetPath}`);
       }
-    }
 
-    resolvedDependencyPath = path.relative(workspace, targetPath);
-    core.info(`Resolved cache-dependency-path: ${resolvedDependencyPath}`);
+      resolvedDependencyPath = path.relative(workspace, targetPath);
+      core.info(`Resolved cache-dependency-path: ${resolvedDependencyPath}`);
+    } catch (error) {
+      core.warning(
+        `Failed to copy file from ${sourcePath} to ${targetPath}: ${error}`
+      );
+    }
   }
 
   const cacheDistributor = getCacheDistributor(