diff --git a/Cargo.lock b/Cargo.lock
index 07ce0fd..f7e326d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,4 +4,4 @@ version = 4
 
 [[package]]
 name = "hello-world"
-version = "0.1.0"
+version = "0.2.0"
diff --git a/src/main.rs b/src/main.rs
index 17e63c8..22e25e2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,7 @@
 ///
 /// Crastimus Maximilian
 
+/// add documentation for main
 fn main() {
     print("Hello, world!");
     print("Goodbye!");