diff --git a/lib/matisse-thesis.typ b/lib/matisse-thesis.typ
index 2590eb2..555fde6 100644
--- a/lib/matisse-thesis.typ
+++ b/lib/matisse-thesis.typ
@@ -179,7 +179,19 @@
 
   // ---------- LISTING ----------
   show raw.where(block: true): it => {
-    block(radius: 1em, fill: luma(240), inset: 1em, width: 80%, {
+    // Line number, not verry good (cannot copy code whitout line number)
+    // see https://github.com/typst/typst/issues/344
+    show raw.line: line => {
+      if line.number < 10 {
+        text(fill: gray)[~#line.number]
+      } else {
+        text(fill: gray)[#line.number]
+      }
+      h(1em)
+      line.body
+    }
+
+    block(radius: 1em, fill: luma(240), inset: 1em, width: 90%, {
       set align(left)
       it
     })