diff --git a/OSZ/exercise_generic.md b/OSZ/exercise_generic.md
index 82301b3..87ea933 100644
--- a/OSZ/exercise_generic.md
+++ b/OSZ/exercise_generic.md
@@ -1,7 +1,7 @@
 ---
-author: Johannes Reinert
+author: Joel Baldauf
 title: Aufgabe
-subtitle: FI-C04
+subtitle: FI-C01
 date: \today
 colorlinks: true
 documentclass: article
@@ -13,8 +13,8 @@ header-includes: |
     \usepackage{hyphenat}
     \hyphenation{Mathe-matik wieder-gewinnen}
     \pagestyle{fancy}
-    \fancyhead[L]{FI-C04}
-    \fancyfoot[L]{Johannes Reinert}
+    \fancyhead[L]{FI-C01}
+    \fancyfoot[L]{Joel Baldauf}
     \fancyfoot[R]{\today}
 ---
 
diff --git a/OSZ/exercise_toc.md b/OSZ/exercise_toc.md
index 11da20c..545e200 100644
--- a/OSZ/exercise_toc.md
+++ b/OSZ/exercise_toc.md
@@ -1,7 +1,7 @@
 ---
-author: Johannes Reinert
+author: Joel Baldauf
 title: Aufgabe
-subtitle: FI-C04
+subtitle: FI-C01
 date: \today
 colorlinks: true
 documentclass: article
@@ -13,8 +13,8 @@ header-includes: |
     \usepackage{hyphenat}
     \hyphenation{Mathe-matik wieder-gewinnen}
     \pagestyle{fancy}
-    \fancyhead[L]{FI-C04}
-    \fancyfoot[L]{Johannes Reinert}
+    \fancyhead[L]{FI-C01}
+    \fancyfoot[L]{Joel Baldauf}
     \fancyfoot[R]{\today}
 ---
 
diff --git a/afib/exercise_course.md b/afib/exercise_course.md
index cd5c9fb..8238017 100644
--- a/afib/exercise_course.md
+++ b/afib/exercise_course.md
@@ -1,5 +1,5 @@
 ---
-author: Johannes Reinert
+author: Joel Baldauf
 title: Kurs
 subtitle: Aufgabe
 date: \today
@@ -12,7 +12,7 @@ header-includes: |
     \hyphenation{Mathe-matik wieder-gewinnen}
     \pagestyle{fancy}
     \fancyhead[L]{Kurs}
-    \fancyfoot[L]{Johannes Reinert}
+    \fancyfoot[L]{Joel Baldauf}
     \fancyfoot[R]{\today}
 ---