diff --git a/.gitignore b/.gitignore
index 87f3a80..9bea203 100644
--- a/.gitignore
+++ b/.gitignore
@@ -152,3 +152,5 @@ dmypy.json
 # Cython debug symbols
 cython_debug/
 
+
+.DS_Store
diff --git a/README.md b/README.md
index 5dbc866..d338746 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,6 @@
 # Seismological Data Analysis 2021
 
-Jupyter Notebooks for class "Seismological Data Analysis"
\ No newline at end of file
+Jupyter Notebooks for class "Seismological Data Analysis" (Summerterm 2021)
+
+## License
+The content of this repository is licensed under Creative Commons Attribution 4.0 International (CC-BY 4.0) ***unless otherwise stated*** (see below)
\ No newline at end of file