diff --git a/README.md b/README.md
index eb098ed..2d1560f 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,10 @@
 | 30.8. | Deadline |
 |  6.9. | Kolloquium |
 
+<details>
+<summary>
 ## Content
+</summary>
 - I2C
     - v2
         - [x] Umbau
@@ -79,6 +82,7 @@
         - [ ] stabilize
     - [ ] regulate the system (with missing information)
         - [ ] write / formulate approach and resulting formula / algorithm
+</details>
 
 ## ToC