diff --git a/@commitlint/cli/index.cjs b/@commitlint/cli/index.cjs
index 794879ebf1..6d5d6c0e62 100644
--- a/@commitlint/cli/index.cjs
+++ b/@commitlint/cli/index.cjs
@@ -1,3 +1,5 @@
+'use strict';
+
 const path = require('node:path');
 
 module.exports = path.join(__dirname, 'cli.js');
diff --git a/@commitlint/cz-commitlint/index.cjs b/@commitlint/cz-commitlint/index.cjs
index df13ed9c83..b5614ae470 100644
--- a/@commitlint/cz-commitlint/index.cjs
+++ b/@commitlint/cz-commitlint/index.cjs
@@ -1,3 +1,5 @@
+'use strict';
+
 /** @type {Awaited<typeof import('./lib/index.js')>['prompter']} */
 exports.prompter = async (...args) => {
 	(await import('./lib/index.js')).prompter(...args);
diff --git a/@commitlint/load/fixtures/basic-config/.commitlintrc.cjs b/@commitlint/load/fixtures/basic-config/.commitlintrc.cjs
index 2f37065f43..3c3d034f67 100644
--- a/@commitlint/load/fixtures/basic-config/.commitlintrc.cjs
+++ b/@commitlint/load/fixtures/basic-config/.commitlintrc.cjs
@@ -1,3 +1,5 @@
+'use strict';
+
 module.exports = {
 	formatter: '@commitlint/format',
 	rules: {
diff --git a/@commitlint/load/fixtures/basic-config/commitlint.config.cjs b/@commitlint/load/fixtures/basic-config/commitlint.config.cjs
index 2f37065f43..3c3d034f67 100644
--- a/@commitlint/load/fixtures/basic-config/commitlint.config.cjs
+++ b/@commitlint/load/fixtures/basic-config/commitlint.config.cjs
@@ -1,3 +1,5 @@
+'use strict';
+
 module.exports = {
 	formatter: '@commitlint/format',
 	rules: {
diff --git a/@commitlint/load/fixtures/extends-config/.commitlintrc.cjs b/@commitlint/load/fixtures/extends-config/.commitlintrc.cjs
index c58cb47afc..a864f31563 100644
--- a/@commitlint/load/fixtures/extends-config/.commitlintrc.cjs
+++ b/@commitlint/load/fixtures/extends-config/.commitlintrc.cjs
@@ -1,3 +1,5 @@
+'use strict';
+
 module.exports = {
 	extends: ['./first-extended'],
 	rules: {
diff --git a/@commitlint/load/fixtures/extends-config/commitlint.config.cjs b/@commitlint/load/fixtures/extends-config/commitlint.config.cjs
index c58cb47afc..a864f31563 100644
--- a/@commitlint/load/fixtures/extends-config/commitlint.config.cjs
+++ b/@commitlint/load/fixtures/extends-config/commitlint.config.cjs
@@ -1,3 +1,5 @@
+'use strict';
+
 module.exports = {
 	extends: ['./first-extended'],
 	rules: {