diff --git a/src/core.js b/src/core.js
index 38f2849..56cce29 100644
--- a/src/core.js
+++ b/src/core.js
@@ -476,7 +476,7 @@ export function hasImageInRule(rule) {
  * @return {Array}
  */
 export function getImageUrl(rule) {
-	const matches = /background[^:]*:.*url\(([\S]+)\)/gi.exec(rule);
+	const matches = /url(?:\(['"]?)(.*?)(?:['"]?\))/gi.exec(rule);
 	let original = '';
 	let normalized = '';
 
diff --git a/test/02-utilities.js b/test/02-utilities.js
index c280add..32946c1 100644
--- a/test/02-utilities.js
+++ b/test/02-utilities.js
@@ -44,6 +44,16 @@ test('should return the url of an image', (t) => {
 	t.deepEqual(getImageUrl(backgroundColor)[1], '');
 });
 
+test('shoud return the url of an image in compressed CSS rules', (t) => {
+	const background = '.selector-a{background:url(square.png) no-repeat 0 0;transform:scale(0.5)}';
+	const backgroundImage = '.selector-a{background-image:url(square.png);transform:scale(0.5)}';
+	const backgroundColor = '.selector-a{background:#fff;transform:scale(0.5)}';
+
+	t.deepEqual(getImageUrl(background)[1], 'square.png');
+	t.deepEqual(getImageUrl(backgroundImage)[1], 'square.png');
+	t.deepEqual(getImageUrl(backgroundColor)[1], '');
+});
+
 test('should remove get params', (t) => {
 	const background = '.selector-b { background: url(square.png?v1234) no-repeat 0 0; }';
 	t.deepEqual(getImageUrl(background)[1], 'square.png');