diff --git a/day1-trebuchet/src/main.rs b/day1-trebuchet/src/main.rs
index 0510a33..0b2001a 100644
--- a/day1-trebuchet/src/main.rs
+++ b/day1-trebuchet/src/main.rs
@@ -6,7 +6,7 @@ fn main () {
         println!("the sum of all calibration values is {sum}!");
 }
 
-fn replace_numbers<'a>(line: &str) -> String {
+fn replace_numbers(line: &str) -> String {
         let numbers: [&str; 10] = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
         let mut processed: String = String::from(line);
         loop {