diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1d33c82ba1..bd0cf3e0a5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -29,7 +29,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm install --legacy-peer-deps
+      - run: npm install
       - run: npx ava
   lint-test:
     runs-on: ${{ matrix.os }}
@@ -44,7 +44,7 @@ jobs:
         with:
           # Locked due to the difference of `zlib.gzipSync()` between Node.js versions
           node-version: 20
-      - run: npm install --legacy-peer-deps
+      - run: npm install
       - run: npm run lint
       - run: npx del-cli test/snapshots --verbose
       # Force update snapshots, https://github.com/avajs/ava/discussions/2754
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
-      - run: npm install --legacy-peer-deps
+      - run: npm install
       - run: npm run run-rules-on-codebase
   integration:
     name: Integration test (${{ matrix.group }})
@@ -85,5 +85,5 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
-      - run: npm install --legacy-peer-deps
+      - run: npm install
       - run: npm run integration -- --group ${{ matrix.group }}
diff --git a/.github/workflows/smoke-test.yml b/.github/workflows/smoke-test.yml
index 04104b0abc..68e4352394 100644
--- a/.github/workflows/smoke-test.yml
+++ b/.github/workflows/smoke-test.yml
@@ -9,12 +9,12 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
       - run: |
-          npm install --legacy-peer-deps
+          npm install
           npm link
-          npm link eslint-plugin-unicorn --legacy-peer-deps
+          npm link eslint-plugin-unicorn
       - uses: AriPerkkio/eslint-remote-tester-run-action@v4
         with:
           issue-title: "Results of weekly scheduled smoke test"
diff --git a/package.json b/package.json
index c0205f9052..054f432b51 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
 		"@babel/core": "^7.24.5",
 		"@babel/eslint-parser": "^7.24.5",
 		"@lubien/fixture-beta-package": "^1.0.0-beta.1",
-		"@typescript-eslint/parser": "^7.8.0",
+		"@typescript-eslint/parser": "^8.0.0-alpha.12",
 		"ava": "^6.1.3",
 		"c8": "^9.1.0",
 		"chalk": "^5.3.0",
diff --git a/rules/ast/is-reference-identifier.js b/rules/ast/is-reference-identifier.js
index 7ebf894119..0794a3acd7 100644
--- a/rules/ast/is-reference-identifier.js
+++ b/rules/ast/is-reference-identifier.js
@@ -120,11 +120,18 @@ function isNotReference(node) {
 			return parent.parameters.includes(node);
 		}
 
+		// `@typescript-eslint/parse` v7
 		// `type Foo = { [Identifier in keyof string]: number; };`
 		case 'TSTypeParameter': {
 			return parent.name === node;
 		}
 
+		// `@typescript-eslint/parse` v8
+		// `type Foo = { [Identifier in keyof string]: number; };`
+		case 'TSMappedType': {
+			return parent.key === node;
+		}
+
 		// `type Identifier = Foo`
 		case 'TSTypeAliasDeclaration': {
 			return parent.id === node;