diff --git a/index.js b/index.js
index 7e9c3ec..d17e8fb 100644
--- a/index.js
+++ b/index.js
@@ -8,7 +8,8 @@ var WHITESPACE_REGEX = /^\s*/;
 // declaration
 var PROPERTY_REGEX = /^(\*?[-#/*\\\w]+(\[[0-9a-z_-]+\])?)\s*/;
 var COLON_REGEX = /^:\s*/;
-var VALUE_REGEX = /^((?:'(?:\\'|.)*?'|"(?:\\"|.)*?"|[^};])+)/;
+var VALUE_REGEX =
+  /^((?:'(?:\\.|[^'\\])*'|"(?:\\.|[^"\\])*"|url\((?:'(?:\\.|[^'\\])*'|"(?:\\.|[^"\\])*"|[^)]*)\)|[^};])+)/;
 var SEMICOLON_REGEX = /^[;\s]*/;
 
 // https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String/Trim#Polyfill
diff --git a/test/data.js b/test/data.js
index 396b99d..415700b 100644
--- a/test/data.js
+++ b/test/data.js
@@ -35,6 +35,7 @@ const cases = [
   "background-image: url('http://example.com/img.png')",
   'background: url(http://example.com/img.png) no-repeat',
   'background: url("data:image/svg+xml,<svg/>")',
+  'background: url(data:image/png; base64,abc+/=)',
 
   // vendor prefixes
   'background: -webkit-linear-gradient(90deg, black, #111)',