diff --git a/Cargo.toml b/Cargo.toml
index 645c17b..0ce7cd1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.16.1"
 authors = ["Narazaki Shuji <shujinarazaki@protonmail.com>"]
 edition = "2021"
 default-run = "sat-bench"
-rust-version = "1.65"
+rust-version = "1.80"
 
 [dependencies]
 chrono ="^0.4"
diff --git a/src/bin/sat-bench.rs b/src/bin/sat-bench.rs
index 017acd0..f281906 100644
--- a/src/bin/sat-bench.rs
+++ b/src/bin/sat-bench.rs
@@ -360,7 +360,7 @@ fn main() {
     .output()
     .expect("failed to execute 'hostname'")
     .stdout; */
-    let h = String::from_utf8_lossy(&host[..host.len() - 1]);
+    let h = String::from_utf8_lossy(host.trim_ascii_end());
     if config.solver_opts.is_empty() {
         println!(
             "# {}, timeout:{} on {} @ {}{}",