diff --git a/src/builtin/filters/string.ts b/src/builtin/filters/string.ts
index 24ee445c9..bdc11d718 100644
--- a/src/builtin/filters/string.ts
+++ b/src/builtin/filters/string.ts
@@ -25,4 +25,4 @@ export default {
     if (arr.length >= l) ret += o
     return ret
   }
-}
\ No newline at end of file
+}
diff --git a/src/context/context.ts b/src/context/context.ts
index 651c5a1f1..196776763 100644
--- a/src/context/context.ts
+++ b/src/context/context.ts
@@ -14,11 +14,11 @@ export default class Context {
     this.opts = applyDefault(opts)
     this.environments = ctx
   }
-  getRegister(key: string, defaultValue = {}) {
-    return this.registers[key] = this.registers[key] || defaultValue
+  getRegister (key: string, defaultValue = {}) {
+    return (this.registers[key] = this.registers[key] || defaultValue)
   }
-  setRegister(key: string, value: any) {
-    return this.registers[key] = value
+  setRegister (key: string, value: any) {
+    return (this.registers[key] = value)
   }
   getAll () {
     return [this.environments, ...this.scopes]
diff --git a/src/template/filter/filter-impl-options.ts b/src/template/filter/filter-impl-options.ts
index 3690c0ea9..84db8556c 100644
--- a/src/template/filter/filter-impl-options.ts
+++ b/src/template/filter/filter-impl-options.ts
@@ -1,3 +1,3 @@
-import { FilterImpl } from "./filter-impl";
+import { FilterImpl } from './filter-impl'
 
-export type FilterImplOptions = (this: FilterImpl, value: any, ...args: any[]) => any
\ No newline at end of file
+export type FilterImplOptions = (this: FilterImpl, value: any, ...args: any[]) => any
diff --git a/src/template/filter/filter-impl.ts b/src/template/filter/filter-impl.ts
index 257075ff3..314134015 100644
--- a/src/template/filter/filter-impl.ts
+++ b/src/template/filter/filter-impl.ts
@@ -1,5 +1,5 @@
-import Context from "../../context/context";
+import Context from '../../context/context'
 
 export interface FilterImpl {
     context: Context
-}
\ No newline at end of file
+}