diff --git a/crates/markdown/src/parser.rs b/crates/markdown/src/parser.rs
index 7c18a1200127eae20cd8779a7ef85dc550d33f76..e5e584728942e40267c547bb3d0cf57826affbdc 100644
--- a/crates/markdown/src/parser.rs
+++ b/crates/markdown/src/parser.rs
@@ -80,8 +80,8 @@ pub fn parse_markdown(
                             content_range.start + range.start..content_range.end + range.start;
 
                         let line_count = text[content_range.clone()]
-                            .bytes()
-                            .filter(|c| *c == b'\n')
+                            .chars()
+                            .filter(|c| *c == '\n')
                             .count();
                         let metadata = CodeBlockMetadata {
                             content_range,