diff --git a/src/textual/widgets/_markdown.py b/src/textual/widgets/_markdown.py
index 7726cd08c4..be460cfcec 100644
--- a/src/textual/widgets/_markdown.py
+++ b/src/textual/widgets/_markdown.py
@@ -790,7 +790,7 @@ def update(self, markdown: str) -> None:
                             style_stack.pop()
 
                 stack[-1].set_content(content)
-            elif token.type == "fence":
+            elif token.type in ("fence", "code_block"):
                 output.append(
                     MarkdownFence(
                         self,