diff --git a/cs/src/day1/initial_house.rs b/cs/src/day1/initial_house.rs
index 0d9314a..856e584 100644
--- a/cs/src/day1/initial_house.rs
+++ b/cs/src/day1/initial_house.rs
@@ -50,7 +50,7 @@ pub fn task() -> Task {
         Check::builder()
             .description("Looking for Max in the living room")
             .validator(FileContent {
-                file: PathBuf::from("living_room/max.txt"),
+                file: PathBuf::from("living_room/Max.txt"),
                 expected: StringContent::Part("beatboxing"),
             })
             .hint("Did you add his hobby `beatboxing` to his file?")
diff --git a/cs/src/day1/zombie.rs b/cs/src/day1/zombie.rs
index 36fa5df..aca05fb 100644
--- a/cs/src/day1/zombie.rs
+++ b/cs/src/day1/zombie.rs
@@ -26,7 +26,7 @@ pub fn task() -> Task {
                     .command(
                         Command::builder()
                             .program("ls")
-                            .args(vec!["living_room/max.txt".into()])
+                            .args(vec!["living_room/Max.txt".into()])
                             .stdout(StdioVariant::Null)
                             .stderr(StdioVariant::Null)
                             .stdin(StdioVariant::Null)
@@ -41,7 +41,7 @@ pub fn task() -> Task {
         Check::builder()
             .description("Looking for Max")
             .validator(FileContent {
-                file: PathBuf::from("bedroom/max.txt"),
+                file: PathBuf::from("bedroom/Max.txt"),
                 expected: StringContent::Part("beatboxing"),
             })
             .hint("Did you move Max into the bedroom? Does he still have his hobby?")
diff --git a/cs/src/day1/zombie_nuked.rs b/cs/src/day1/zombie_nuked.rs
index fed5944..e2e858f 100644
--- a/cs/src/day1/zombie_nuked.rs
+++ b/cs/src/day1/zombie_nuked.rs
@@ -32,7 +32,7 @@ pub fn task() -> Task {
         Check::builder()
             .description("Looking for Max")
             .validator(FileContent {
-                file: PathBuf::from("bedroom/max.txt"),
+                file: PathBuf::from("bedroom/Max.txt"),
                 expected: StringContent::Part("beatboxing"),
             })
             .hint("Is Max in the bedroom? Does he still have his hobby?")
diff --git a/src/day_1/tasks.md b/src/day_1/tasks.md
index 1b3dc86..fcb86d8 100644
--- a/src/day_1/tasks.md
+++ b/src/day_1/tasks.md
@@ -64,7 +64,7 @@ Place Max in the living room by creating a file `Max.txt` in the living room con
 Example:
 
 ```console
-$ cat living_room/max.txt
+$ cat living_room/Max.txt
 He is watching TV.
 His hobby is beatboxing.
 ```