diff --git a/@commitlint/ensure/src/case.js b/@commitlint/ensure/src/case.js
index db0f1b1ed5b..818ba5ab37e 100644
--- a/@commitlint/ensure/src/case.js
+++ b/@commitlint/ensure/src/case.js
@@ -33,13 +33,8 @@ function toCase(input, target) {
 		case 'uppercase':
 			return input.toUpperCase();
 		case 'sentence-case':
-		case 'sentencecase': {
-			const [word] = input.split(' ');
-			return `${toCase(word.charAt(0), 'upper-case')}${toCase(
-				word.slice(1),
-				'lower-case'
-			)}${input.slice(word.length)}`;
-		}
+		case 'sentencecase':
+			return input.charAt(0).toUpperCase() + input.slice(1);
 		case 'lower-case':
 		case 'lowercase':
 		case 'lowerCase': // Backwards compat config-angular v4
diff --git a/@commitlint/ensure/src/case.test.js b/@commitlint/ensure/src/case.test.js
index ec517ee88d1..f04fccc0d11 100644
--- a/@commitlint/ensure/src/case.test.js
+++ b/@commitlint/ensure/src/case.test.js
@@ -61,16 +61,16 @@ test('false for lowercase on sentencecase', t => {
 	t.is(ensure('sentence case', 'sentence-case'), false);
 });
 
-test('false for UPPERCASE on sentencecase', t => {
-	t.is(ensure('UPPERCASE', 'sentence-case'), false);
+test('true for UPPERCASE on sentencecase', t => {
+	t.is(ensure('UPPERCASE', 'sentence-case'), true);
 });
 
 test('true for Start Case on sentencecase', t => {
 	t.is(ensure('Start Case', 'sentence-case'), true);
 });
 
-test('false for PascalCase on sentencecase', t => {
-	t.is(ensure('PascalCase', 'sentence-case'), false);
+test('true for PascalCase on sentencecase', t => {
+	t.is(ensure('PascalCase', 'sentence-case'), true);
 });
 
 test('false for kebab-case on sentencecase', t => {