diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d2c8843..ded1cea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        node: [25.x, 24.x, 22.x, 20.x, 18.x, "18.18.0"]
+        node: [25.x, 24.x, 22.x, 20.x, "20.19.0"]
         include:
         - os: windows-latest
           node: "lts/*"
diff --git a/package.json b/package.json
index 4ff12ce..4033d93 100644
--- a/package.json
+++ b/package.json
@@ -42,13 +42,13 @@
         "semver": "^7.7.1"
     },
     "devDependencies": {
-        "@vitest/coverage-v8": "^1.3.1",
+        "@vitest/coverage-v8": "^4.0.6",
         "eslint": "^9.35.0",
         "eslint-config-eslint": "^13.0.0",
         "lint-staged": "^12.1.2",
         "memfs": "^4.0.0",
         "sinon": "^21.0.0",
-        "vitest": "^1.1.1",
+        "vitest": "^4.0.6",
         "yorkie": "^2.0.0"
     },
     "engines": {
diff --git a/tests/config-snapshots.spec.js b/tests/config-snapshots.spec.js
index cee170c..e6096a4 100644
--- a/tests/config-snapshots.spec.js
+++ b/tests/config-snapshots.spec.js
@@ -85,7 +85,7 @@ describe("generate config for esm projects", () => {
             expect(generator.result.configFilename).toBe(`eslint.config.${expectedExtension}`);
             expect(generator.packageJsonPath).toBe(join(esmProjectDir, "./package.json"));
             expect(generator.result.configContent.endsWith("\n")).toBe(true);
-            expect(generator.result).toMatchFileSnapshot(`./__snapshots__/${item.name}`);
+            await expect(generator.result).toMatchFileSnapshot(`./__snapshots__/${item.name}`);
         });
     });
 
@@ -150,7 +150,7 @@ describe("generate config for cjs projects", () => {
             expect(generator.result.configFilename).toBe(`eslint.config.${expectedExtension}`);
             expect(generator.packageJsonPath).toBe(join(cjsProjectDir, "./package.json"));
             expect(generator.result.configContent.endsWith("\n")).toBe(true);
-            expect(generator.result).toMatchFileSnapshot(`./__snapshots__/${item.name}`);
+            await expect(generator.result).toMatchFileSnapshot(`./__snapshots__/${item.name}`);
         });
     });
 });