diff --git a/02_1_referat_zu_pro_&_contra_von_open_source.md b/02_1_referat_zu_pro_&_contra_von_open_source.md
index 6075ffd..b6a2444 100644
--- a/02_1_referat_zu_pro_&_contra_von_open_source.md
+++ b/02_1_referat_zu_pro_&_contra_von_open_source.md
@@ -1,2 +1,2 @@
-# Referat zu Pro & Contra von Open Source
+# 2.1 Referat zu Pro & Contra von Open Source