diff --git a/.eslintrc.js b/.eslintrc.js
index 070c14b7e..8dd992a44 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -143,6 +143,7 @@ module.exports = {
 		'keyword-spacing': ['error', { 'before': true, 'after': true }],
 		'no-multi-spaces': ['error'],
 		'prefer-object-spread': ['error'],
+		'prefer-regex-literals': ['error', { disallowRedundantWrapping: true }],
 
 		// Regarding the keyword blacklist:
 		// - err: We generally avoid using too many abbreviations, so it should
diff --git a/packages/lib/SyncTargetOneDrive.ts b/packages/lib/SyncTargetOneDrive.ts
index 34dfb420a..de2d99ff1 100644
--- a/packages/lib/SyncTargetOneDrive.ts
+++ b/packages/lib/SyncTargetOneDrive.ts
@@ -108,6 +108,7 @@ export default class SyncTargetOneDrive extends BaseSyncTarget {
 		// the appDir might contain non-ASCII characters
 		// /[^\u0021-\u00ff]/ is used in Node.js to detect the unescaped characters.
 		// See https://github.com/nodejs/node/blob/bbbf97b6dae63697371082475dc8651a6a220336/lib/_http_client.js#L176
+		// eslint-disable-next-line prefer-regex-literals -- Old code before rule was applied
 		const baseDir = RegExp(/[^\u0021-\u00ff]/).exec(appDir) !== null ? encodeURI(appDir) : appDir;
 		const fileApi = new FileApi(baseDir, new FileApiDriverOneDrive(this.api()));
 		fileApi.setSyncTargetId(this.syncTargetId());
diff --git a/packages/renderer/MdToHtml/setupLinkify.ts b/packages/renderer/MdToHtml/setupLinkify.ts
index 36b89cd21..c03f1db0c 100644
--- a/packages/renderer/MdToHtml/setupLinkify.ts
+++ b/packages/renderer/MdToHtml/setupLinkify.ts
@@ -6,6 +6,7 @@ export default function(markdownIt: any) {
 			const tail = text.slice(pos);
 			if (!self.re.file) {
 				// matches all local file URI on Win/Unix/MacOS systems including reserved characters in some OS (i.e. no OS specific sanity check)
+				// eslint-disable-next-line prefer-regex-literals -- Old code before rule was applied
 				self.re.file = new RegExp('^[\\/]{2,3}[\\S]+');
 			}
 			if (self.re.file.test(tail)) {