diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index fc9ee06..8e2f516 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -26,5 +26,6 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install valgrind
         run: sudo apt install valgrind
+      - run: rustup update --no-self-update 1.82 && rustup default 1.82
       - name: Run tests
         run: cargo test
diff --git a/.github/workflows/style.yaml b/.github/workflows/style.yaml
index 615e052..3542015 100644
--- a/.github/workflows/style.yaml
+++ b/.github/workflows/style.yaml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - run: rustup update stable && rustup default stable
+      - run: rustup update --no-self-update 1.83 && rustup default 1.83
       - run: rustup component add clippy
       - name: Run linter
         run: cargo clippy --color=always -- -D warnings
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e258ac..ea0b673 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## unreleased
 - Add more helpful error message if the program under test overflows its stack ([#93](https://github.com/jfrimmel/cargo-valgrind/pull/93))
+- Perform LTO on release ([#109](https://github.com/jfrimmel/cargo-valgrind/pull/109))
+- Updated documentation
+- Raised MSRV to 1.58
 
 ## Version 2.2.1
 - Ensure, that consistent tag names are used ([#89](https://github.com/jfrimmel/cargo-valgrind/pull/89)).
diff --git a/src/valgrind/xml/mod.rs b/src/valgrind/xml/mod.rs
index 98c3cd9..661e522 100644
--- a/src/valgrind/xml/mod.rs
+++ b/src/valgrind/xml/mod.rs
@@ -164,7 +164,7 @@ pub struct Frame {
 }
 impl Display for Frame {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-        f.write_str(self.function.as_ref().unwrap_or(&"unknown".into()))?;
+        f.write_str(self.function.as_ref().map_or("unknown", |s| s.as_str()))?;
         if let Some(file) = &self.file {
             f.write_str(" (")?;
             f.write_str(file)?;
@@ -183,7 +183,7 @@ fn deserialize_hex<'de, D: Deserializer<'de>>(deserializer: D) -> Result<u64, D:
 
 /// A visitor for parsing a `u64` in the format `0xDEADBEEF`.
 struct HexVisitor;
-impl<'de> Visitor<'de> for HexVisitor {
+impl Visitor<'_> for HexVisitor {
     type Value = u64;
 
     fn expecting(&self, f: &mut Formatter) -> fmt::Result {