diff --git a/index.js b/index.js
index 6b37139..e75ce96 100644
--- a/index.js
+++ b/index.js
@@ -16,8 +16,7 @@ function getDelimiters (tag) {
 
 // Escape inner text between delimiters
 function escapeTextInDelimiters (str, start, end) {
-  var middleTextRegex = new RegExp(start + '(.*)' + end)
-  var middleText = str.match(middleTextRegex)[1]
+  var middleText = str.slice(start.length, end.length * -1)
   return start + escapeHtml(middleText) + end
 }
 
diff --git a/test/xmp-escape-loader.test.js b/test/xmp-escape-loader.test.js
index 76b1537..0397198 100644
--- a/test/xmp-escape-loader.test.js
+++ b/test/xmp-escape-loader.test.js
@@ -13,8 +13,8 @@ test('can receive custom tag', () => {
   expect(output).toEqual('<pre>&lt;div&gt; Test &lt;/div&gt;</pre>')
 })
 
-test('works on nested tags', () => {
-  const input = '<xmp><xmp> Test </xmp></xmp>'
+test('works on multiline inputs', () => {
+  const input = '<xmp>\n<div> Test </div>\n</xmp>'
   const output = xmpEscapeLoader(input)
-  expect(output).toEqual('<xmp>&lt;xmp&gt; Test </xmp></xmp>')
+  expect(output).toEqual('<xmp>\n&lt;div&gt; Test &lt;/div&gt;\n</xmp>')
 })