diff --git a/.changeset/honest-paws-rule.md b/.changeset/honest-paws-rule.md
new file mode 100644
index 0000000..043440c
--- /dev/null
+++ b/.changeset/honest-paws-rule.md
@@ -0,0 +1,5 @@
+---
+"vite-plugin-eslint4b": patch
+---
+
+fix: add support for eslint v9.5
diff --git a/src/vite-plugin-eslint4b.ts b/src/vite-plugin-eslint4b.ts
index 1bd9373..5400d60 100644
--- a/src/vite-plugin-eslint4b.ts
+++ b/src/vite-plugin-eslint4b.ts
@@ -214,10 +214,17 @@ function buildLinter() {
 
 function buildSourceCode() {
   const eslintPackageJsonPath = requireResolved("eslint/package.json");
-  const sourceCodePath = resolveAndNormalizePath(
+  let sourceCodePath = resolveAndNormalizePath(
     eslintPackageJsonPath,
     "../lib/source-code/index.js",
   );
+  if (!fs.existsSync(sourceCodePath)) {
+    // ESLint v9.5.0 and later
+    sourceCodePath = resolveAndNormalizePath(
+      eslintPackageJsonPath,
+      "../lib/languages/js/source-code/index.js",
+    );
+  }
   return build(sourceCodePath, ["path", "node:path", "assert", "node:assert"]);
 }
 
diff --git a/tests/fixtures/build-test/src/index.ts b/tests/fixtures/build-test/src/index.ts
index 9790406..b3147a4 100644
--- a/tests/fixtures/build-test/src/index.ts
+++ b/tests/fixtures/build-test/src/index.ts
@@ -4,14 +4,11 @@ import { name } from "eslint/package.json";
 import * as TSESLintUtils from "@typescript-eslint/utils";
 import * as TSESLintPlugin from "@typescript-eslint/eslint-plugin";
 
-const linter = new Linter({ configType: "eslintrc" });
+const linter = new Linter({});
 
 export function lint(): Linter.LintMessage[] {
   return linter.verify("const a = 1", [
     {
-      languageOptions: {
-        ecmaVersion: 2020,
-      },
       rules: { semi: "error" },
     },
   ]);
diff --git a/tests/src/vite-plugin-eslint4b.ts b/tests/src/vite-plugin-eslint4b.ts
index 7ad75e4..f5b795a 100644
--- a/tests/src/vite-plugin-eslint4b.ts
+++ b/tests/src/vite-plugin-eslint4b.ts
@@ -6,12 +6,7 @@ import type { Linter } from "eslint";
 
 const dynamicImport = new Function("file", "return import(file)");
 describe("Build with Vite", () => {
-  if (
-    !semver.satisfies(
-      process.version,
-      "^18.18.0 || ^20.9.0 || >=21.1.018.0.0 || ",
-    )
-  ) {
+  if (!semver.satisfies(process.version, "^18.18.0 || ^20.9.0 || >=21.1.0")) {
     return;
   }
   let originalCwd: string;