diff --git a/common/framework/formatter.php b/common/framework/formatter.php
index e875c2ac8..459ad8eed 100644
--- a/common/framework/formatter.php
+++ b/common/framework/formatter.php
@@ -339,6 +339,10 @@ class Formatter
 				$import_content = '';
 				$import_files = array_map(function($str) use($filename, $import_type) {
 					$str = trim(trim(trim(preg_replace('/^url\\(([^()]+)\\)$/', '$1', trim($str))), '"\''));
+					if (preg_match('!^(https?:)?//!i', $str))
+					{
+						return $str;
+					}
 					if ($import_type === 'scss')
 					{
 						if (($dirpos = strrpos($str, '/')) !== false)
@@ -367,10 +371,14 @@ class Formatter
 				}, explode(',', $matches[1]));
 				foreach ($import_files as $import_filename)
 				{
-					if (file_exists($import_filename))
+					if (!preg_match('!^(https?:)?//!i', $import_filename) && file_exists($import_filename))
 					{
 						$import_content .= self::concatCSS($import_filename, $target_filename, false);
 					}
+					else
+					{
+						$import_content .= '@import url("' . escape_dqstr($import_filename) . '");';
+					}
 				}
 				return trim($import_content);
 			}, $content);
diff --git a/tests/_data/formatter/concat.source2.css b/tests/_data/formatter/concat.source2.css
index 639cfbcdd..13ffd0fbc 100644
--- a/tests/_data/formatter/concat.source2.css
+++ b/tests/_data/formatter/concat.source2.css
@@ -1,5 +1,7 @@
 @charset "UTF-8";
 @import url(concat.source3.css);
+@import url(//fonts.googleapis.com/earlyaccess/nanumgothic.css);
+@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR&display=swap');
 .wordpress {
 	border-radius: 4px;
 }
diff --git a/tests/_data/formatter/concat.target1.css b/tests/_data/formatter/concat.target1.css
index 99f47778f..91f2f365e 100644
--- a/tests/_data/formatter/concat.target1.css
+++ b/tests/_data/formatter/concat.target1.css
@@ -12,6 +12,8 @@
 	background-image: url("../_data/_data/formatter/test.jpg");
 	font-family: sans-serif;
 }
+@import url("//fonts.googleapis.com/earlyaccess/nanumgothic.css");
+@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+KR&display=swap");
 .wordpress {
 	border-radius: 4px;
 }
diff --git a/tests/_data/formatter/concat.target2.css b/tests/_data/formatter/concat.target2.css
index a8ec16098..198329c07 100644
--- a/tests/_data/formatter/concat.target2.css
+++ b/tests/_data/formatter/concat.target2.css
@@ -16,6 +16,8 @@
 	background-image: url("../_data/_data/formatter/test.jpg");
 	font-family: sans-serif;
 }
+@import url("//fonts.googleapis.com/earlyaccess/nanumgothic.css");
+@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+KR&display=swap");
 .wordpress {
 	border-radius: 4px;
 }