diff --git a/Seminar.md b/Seminar.md
index 2e14f86..a716a04 100644
--- a/Seminar.md
+++ b/Seminar.md
@@ -12,6 +12,7 @@
 
 weitere Themen:
 - Swift
+- Gamecenter
 - Xcode
 - ARKit 1&2