diff --git a/build_summary b/build_summary
index 592452f..889f2c6 100755
--- a/build_summary
+++ b/build_summary
@@ -1 +1,4 @@
-tree -L 2 > summary.md
+echo '```' > summary.md
+tree -L 2 >> summary.md
+echo '```' >> summary.md
+
diff --git a/summary.md b/summary.md
index f9d48fa..f628ac0 100644
--- a/summary.md
+++ b/summary.md
@@ -1,3 +1,4 @@
+```
 .
 ├── LICENSE
 ├── README.md
@@ -104,3 +105,4 @@
 └── summary.md
 
 77 directories, 26 files
+```