diff --git a/lib/plugins/helper/date.ts b/lib/plugins/helper/date.ts
index 01f3ec356a..b347770dc8 100644
--- a/lib/plugins/helper/date.ts
+++ b/lib/plugins/helper/date.ts
@@ -92,4 +92,4 @@ export {fullDateHelper as full_date};
 export {relativeDateHelper as relative_date};
 export {timeTagHelper as time_tag};
 export {moment};
-export var toMomentLocale = moize.shallow(_toMomentLocale);
+export const toMomentLocale = moize.shallow(_toMomentLocale);
diff --git a/lib/theme/processors/config.ts b/lib/theme/processors/config.ts
index b2a175b2b0..2da78854d6 100644
--- a/lib/theme/processors/config.ts
+++ b/lib/theme/processors/config.ts
@@ -15,4 +15,4 @@ export function process(file) {
   });
 }
 
-export var pattern = new Pattern(/^_config\.\w+$/);
+export const pattern = new Pattern(/^_config\.\w+$/);
diff --git a/lib/theme/processors/i18n.ts b/lib/theme/processors/i18n.ts
index 515c6b2e5b..fcdc457aae 100644
--- a/lib/theme/processors/i18n.ts
+++ b/lib/theme/processors/i18n.ts
@@ -18,4 +18,4 @@ export function process(file) {
   });
 }
 
-export var pattern = new Pattern('languages/*path');
+export const pattern = new Pattern('languages/*path');
diff --git a/lib/theme/processors/source.ts b/lib/theme/processors/source.ts
index 97688b7ba7..f7ff6a4a0c 100644
--- a/lib/theme/processors/source.ts
+++ b/lib/theme/processors/source.ts
@@ -22,7 +22,7 @@ export function process(file) {
   });
 }
 
-export var pattern = new Pattern(path => {
+export const pattern = new Pattern(path => {
   if (!path.startsWith('source/')) return false;
 
   path = path.substring(7);
diff --git a/lib/theme/processors/view.ts b/lib/theme/processors/view.ts
index fe3cf1d04c..bb0d44d1f8 100644
--- a/lib/theme/processors/view.ts
+++ b/lib/theme/processors/view.ts
@@ -1,4 +1,4 @@
-import {Pattern} from 'hexo-util';
+import { Pattern } from 'hexo-util';
 
 export function process(file) {
   const { path } = file.params;
@@ -13,4 +13,4 @@ export function process(file) {
   });
 }
 
-export var pattern = new Pattern('layout/*path');
+export const pattern = new Pattern('layout/*path');