diff --git a/src/Renderer/Inline/EmphasisRenderer.php b/src/Renderer/Inline/EmphasisRenderer.php
index 7255574..9504495 100644
--- a/src/Renderer/Inline/EmphasisRenderer.php
+++ b/src/Renderer/Inline/EmphasisRenderer.php
@@ -38,6 +38,13 @@ public function render(Node $node, ChildNodeRendererInterface $childRenderer): s
             return "*{$content}*";
         }
 
-        return "_{$content}_";
+        if ($this->config->get('commonmark/use_underscore')) {
+            return "_{$content}_";
+        }
+
+        $openingDelimiter = $node->getOpeningDelimiter();
+        $closingDelimiter = $node->getClosingDelimiter();
+
+        return "$openingDelimiter{$content}$closingDelimiter";
     }
 }
diff --git a/tests/Renderer/Inline/EmphasisRendererTest.php b/tests/Renderer/Inline/EmphasisRendererTest.php
index 5e300dd..8943afb 100644
--- a/tests/Renderer/Inline/EmphasisRendererTest.php
+++ b/tests/Renderer/Inline/EmphasisRendererTest.php
@@ -24,7 +24,7 @@ protected function setUp(): void
     }
 
     #[Test]
-    public function it_renders_emphasis(): void
+    public function it_renders_emphasis_using_asterisk(): void
     {
         $block = new Emphasis();
         $fakeRenderer = new FakeChildNodeRenderer();
@@ -36,6 +36,45 @@ public function it_renders_emphasis(): void
         $this->assertEquals('*::children::*', $result);
     }
 
+    #[Test]
+    public function it_renders_emphasis_using_underscore(): void
+    {
+        $block = new Emphasis('_');
+        $fakeRenderer = new FakeChildNodeRenderer();
+        $fakeRenderer->pretendChildrenExist();
+
+        $this->renderer->setConfiguration($this->createConfiguration([
+            'commonmark' => [
+                'use_asterisk' => false,
+            ],
+        ]));
+
+        $result = $this->renderer->render($block, $fakeRenderer);
+
+        $this->assertIsString($result);
+        $this->assertEquals('_::children::_', $result);
+    }
+
+    #[Test]
+    public function it_renders_emphasis_with_whatever_delimiter_used(): void
+    {
+        $block = new Emphasis('$');
+        $fakeRenderer = new FakeChildNodeRenderer();
+        $fakeRenderer->pretendChildrenExist();
+
+        $this->renderer->setConfiguration($this->createConfiguration([
+            'commonmark' => [
+                'use_asterisk' => false,
+                'use_underscore' => false,
+            ],
+        ]));
+
+        $result = $this->renderer->render($block, $fakeRenderer);
+
+        $this->assertIsString($result);
+        $this->assertEquals('$::children::$', $result);
+    }
+
     /**
      * @param array<string, mixed> $values
      */