diff --git a/src/Converter.php b/src/Converter.php
index ce16fe8..9d2c325 100644
--- a/src/Converter.php
+++ b/src/Converter.php
@@ -190,7 +190,7 @@ protected function searchAndReplace($search, $replace): void
             $replace = $callableReplace();
         }
 
-        $regexStart = !$this->isCssClassesOnly ? '(?<start>class\s*=\s*(?<quotation>["\'])((?!\k<quotation>).)*)' : '(?<start>\s*)';
+        $regexStart = !$this->isCssClassesOnly ? '(?<start>class(?:Name)?\s*=\s*(?<quotation>["\'])((?!\k<quotation>).)*)' : '(?<start>\s*)';
         $regexEnd = !$this->isCssClassesOnly ? '(?<end>((?!\k<quotation>).)*\k<quotation>)' : '(?<end>\s*)';
 
         $search = preg_quote($search);
diff --git a/tests/Bootstrap/ConverterTest.php b/tests/Bootstrap/ConverterTest.php
index 241bf55..995f8b2 100644
--- a/tests/Bootstrap/ConverterTest.php
+++ b/tests/Bootstrap/ConverterTest.php
@@ -41,4 +41,13 @@ public function it_returns_output_with_prefix()
             $this->converter->setContent('<a class="text-muted">love</a>')->convert()->get()
         );
     }
+
+    /** @test */
+    public function it_handles_jsx_class_name()
+    {
+        $this->assertEquals(
+            '<a className="sm:flex text-gray-700">love</a>',
+            $this->converter->setContent('<a className="d-sm-flex text-muted">love</a>')->convert()->get()
+        );
+    }
 }