diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1ff92d7..4404ba0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
       matrix:
         rust:
           - stable
-          - 1.43.0
+          - 1.74.0
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
@@ -37,7 +37,7 @@ jobs:
       matrix:
         rust:
           - stable
-          - 1.43.0
+          - 1.74.0
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
@@ -66,22 +66,34 @@ jobs:
       fail-fast: false
       matrix:
         job:
+          # Ubuntu 22.04
+          - { os: ubuntu-22.04 , target: x86_64-unknown-linux-gnu    , use-cross: false }
+          - { os: ubuntu-22.04 , target: x86_64-unknown-linux-musl   , use-cross: true }
+          - { os: ubuntu-22.04 , target: arm-unknown-linux-gnueabihf , use-cross: true }
+          - { os: ubuntu-22.04 , target: aarch64-unknown-linux-gnu   , use-cross: true }
+          - { os: ubuntu-22.04 , target: i586-unknown-linux-gnu      , use-cross: true }
+          - { os: ubuntu-22.04 , target: i686-unknown-linux-gnu      , use-cross: true }
+          - { os: ubuntu-22.04 , target: i686-unknown-linux-musl     , use-cross: true }
           # Ubuntu 20.04
-          - { os: ubuntu-20.04   , target: x86_64-unknown-linux-gnu    , use-cross: false }
-          - { os: ubuntu-20.04   , target: x86_64-unknown-linux-musl   , use-cross: true  }
-          - { os: ubuntu-20.04   , target: arm-unknown-linux-gnueabihf , use-cross: true  }
-          - { os: ubuntu-20.04   , target: aarch64-unknown-linux-gnu   , use-cross: true  }
-          - { os: ubuntu-20.04   , target: i586-unknown-linux-gnu      , use-cross: true  }
-          - { os: ubuntu-20.04   , target: i686-unknown-linux-gnu      , use-cross: true  }
-          - { os: ubuntu-20.04   , target: i686-unknown-linux-musl     , use-cross: true  }
-          # Older Ubuntu versions
-          - { os: ubuntu-18.04   , target: x86_64-unknown-linux-gnu    , use-cross: false }
-          # MacOS
-          - { os: macos-10.15    , target: x86_64-apple-darwin         , use-cross: false }
-          # Windows
-          - { os: windows-2019   , target: i686-pc-windows-msvc        , use-cross: false }
-          - { os: windows-2019   , target: x86_64-pc-windows-gnu       , use-cross: false }
-          - { os: windows-2019   , target: x86_64-pc-windows-msvc      , use-cross: false }
+          - { os: ubuntu-20.04 , target: x86_64-unknown-linux-gnu    , use-cross: false }
+          - { os: ubuntu-20.04 , target: x86_64-unknown-linux-musl   , use-cross: true }
+          - { os: ubuntu-20.04 , target: arm-unknown-linux-gnueabihf , use-cross: true }
+          - { os: ubuntu-20.04 , target: aarch64-unknown-linux-gnu   , use-cross: true }
+          - { os: ubuntu-20.04 , target: i586-unknown-linux-gnu      , use-cross: true }
+          - { os: ubuntu-20.04 , target: i686-unknown-linux-gnu      , use-cross: true }
+          - { os: ubuntu-20.04 , target: i686-unknown-linux-musl     , use-cross: true }
+          # MacOS 14
+          - { os: macos-14     , target: aarch64-apple-darwin        , use-cross: false }
+          # Macos 13
+          - { os: macos-13     , target: x86_64-apple-darwin         , use-cross: false }
+          # Windows 2022
+          - { os: windows-2022 , target: i686-pc-windows-msvc        , use-cross: false }
+          - { os: windows-2022 , target: x86_64-pc-windows-gnu       , use-cross: false }
+          - { os: windows-2022 , target: x86_64-pc-windows-msvc      , use-cross: false }
+          # Windows 2019
+          - { os: windows-2019 , target: i686-pc-windows-msvc        , use-cross: false }
+          - { os: windows-2019 , target: x86_64-pc-windows-gnu       , use-cross: false }
+          - { os: windows-2019 , target: x86_64-pc-windows-msvc      , use-cross: false }
 
     runs-on: ${{ matrix.job.os }}
     steps:
@@ -125,7 +137,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.43.0
+          toolchain: 1.74.0
           override: true
       - run: rustup component add rustfmt
       - uses: actions-rs/cargo@v1
@@ -142,7 +154,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.43.0
+          toolchain: 1.74.0
           override: true
       - run: rustup component add clippy
       - uses: actions-rs/cargo@v1
diff --git a/src/collector.rs b/src/collector.rs
index 8707eb7..4b4c543 100644
--- a/src/collector.rs
+++ b/src/collector.rs
@@ -2,6 +2,7 @@
 
 use std::borrow::Cow;
 use std::ffi::{OsStr, OsString};
+use std::fmt::Write;
 use std::fs;
 use std::path::{Path, PathBuf};
 use std::process::Command;
@@ -219,12 +220,13 @@ impl Collector for EnvironmentVariables {
         let mut result = String::new();
 
         for var in &self.list {
-            let value = std::env::var_os(&var).map(|value| value.to_string_lossy().into_owned());
+            let value = std::env::var_os(var).map(|value| value.to_string_lossy().into_owned());
             let value: Option<String> =
                 value.map(|v| shell_escape::escape(Cow::Borrowed(&v)).into());
 
-            result += &format!(
-                "{}={}\n",
+            let _ = writeln!(
+                result,
+                "{}={}",
                 var.to_string_lossy(),
                 value.unwrap_or_else(|| "<not set>".into())
             );
diff --git a/src/collector/directory_entries.rs b/src/collector/directory_entries.rs
index bd6ec6b..f96f37e 100644
--- a/src/collector/directory_entries.rs
+++ b/src/collector/directory_entries.rs
@@ -1,3 +1,4 @@
+use std::fmt::Write;
 use std::fs::{self, DirEntry};
 use std::io::ErrorKind;
 use std::path::{Path, PathBuf};
@@ -80,7 +81,7 @@ fn dir_entry_to_report_entry(dir_entry: DirEntry) -> String {
 
     if let Ok(metadata) = dir_entry.metadata() {
         if metadata.is_file() {
-            text.push_str(&format!(", {} bytes", metadata.len()));
+            let _ = write!(text, ", {} bytes", metadata.len());
         } else if metadata.is_dir() {
             text.push(std::path::MAIN_SEPARATOR);
         }