diff --git a/src/builtin/filters/string.ts b/src/builtin/filters/string.ts
index b31013ec7..bf68c50c8 100644
--- a/src/builtin/filters/string.ts
+++ b/src/builtin/filters/string.ts
@@ -54,7 +54,7 @@ export function stripNewlines (v: string) {
 
 export function capitalize (str: string) {
   str = stringify(str)
-  return str.charAt(0).toUpperCase() + str.slice(1)
+  return str.charAt(0).toUpperCase() + str.slice(1).toLowerCase()
 }
 
 export function replace (v: string, pattern: string, replacement: string) {
diff --git a/test/integration/builtin/filters/string.ts b/test/integration/builtin/filters/string.ts
index 29d0998b0..e2fdc388d 100644
--- a/test/integration/builtin/filters/string.ts
+++ b/test/integration/builtin/filters/string.ts
@@ -33,6 +33,9 @@ describe('filters/string', function () {
     it('should capitalize first', () => test('{{ "i am good" | capitalize }}', 'I am good'))
     it('should return empty for nil', () => test('{{ nil | capitalize }}', ''))
     it('should return empty for undefined', async () => test('{{ foo | capitalize }}', ''))
+    it('should capitalize only first word', async () => test('{{"foo bar" | capitalize}}', 'Foo bar'))
+    it('should to lower case if prefixed by spaces', async () => test('{{" foo BaR" | capitalize}}', ' foo bar'))
+    it('should to lower case trailing words', async () => test('{{"foo BaR" | capitalize}}', 'Foo bar'))
   })
   describe('concat', function () {
     it('should concat arrays', () => test(`