diff --git a/adder/src/lib.rs b/adder/src/lib.rs
index 682e8ae..a6c9a49 100644
--- a/adder/src/lib.rs
+++ b/adder/src/lib.rs
@@ -1,5 +1,5 @@
 pub fn add_two(a: usize) -> usize {
-    a + 2
+    a + 3
 }
 
 #[cfg(test)]