diff --git a/src/index.ts b/src/index.ts
index 1917d0af1..1393deeb3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -118,7 +118,7 @@ const normalizeOptions = async (
   }
 
   if (Array.isArray(entry)) {
-    const matcher = picomatch(entry)
+    const matcher = picomatch(entry, { windows: process.platform === 'win32' })
     options.entry = await new fdir()
       .withRelativePaths()
       .filter((file) => matcher(file))
diff --git a/src/utils.ts b/src/utils.ts
index b01e6fe9a..04c08a4ec 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -79,6 +79,7 @@ export async function removeFiles(patterns: string[], dir: string) {
   const matcher = picomatch(matchPatterns, {
     dot: true,
     ignore: ignorePatterns,
+    windows: process.platform === 'win32',
   })
 
   const files = await new fdir()
diff --git a/test/utils.ts b/test/utils.ts
index 7924fa807..2b60ffb1a 100644
--- a/test/utils.ts
+++ b/test/utils.ts
@@ -61,7 +61,7 @@ export async function run(
     .withRelativePaths()
     .crawl(path.resolve(testDir, 'dist'))
     .withPromise()
-    .then((res) => res.sort())
+    .then((res) => res.map((f) => f.replaceAll('\\', '/')).sort())
 
   return {
     get output() {