diff --git a/Cargo.toml b/Cargo.toml
index 7298475..9ed94c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "rev_buf_reader"
 version = "0.3.0"
 authors = ["André Vicente Milack <andrevicente.m@gmail.com>"]
-edition = "2021"
+edition = "2024"
 description = "Crate that provides a buffered reader capable of reading chunks of bytes of a data stream in reverse order. Its implementation is an adapted copy of BufReader from the nightly std::io."
 repository = "https://github.com/andre-vm/rev_buf_reader"
 exclude = ["base/*"]
@@ -14,4 +14,4 @@ default = []
 read_initializer = []
 
 [dependencies]
-memchr = "2.4.1"
+memchr = "2.8.0"
diff --git a/src/io_helpers.rs b/src/io_helpers.rs
index 169dde9..0c793f3 100644
--- a/src/io_helpers.rs
+++ b/src/io_helpers.rs
@@ -40,21 +40,23 @@ pub(crate) unsafe fn append_to_string<F>(buf: &mut String, f: F) -> io::Result<u
 where
     F: FnOnce(&mut Vec<u8>) -> io::Result<usize>,
 {
-    let mut g = Guard {
-        len: buf.len(),
-        buf: buf.as_mut_vec(),
-    };
-    let ret = f(g.buf);
-    if str::from_utf8(&g.buf[g.len..]).is_err() {
-        ret.and_then(|_| {
-            Err(io::Error::new(
-                io::ErrorKind::InvalidData,
-                "stream did not contain valid UTF-8",
-            ))
-        })
-    } else {
-        g.len = g.buf.len();
-        ret
+    unsafe {
+        let mut g = Guard {
+            len: buf.len(),
+            buf: buf.as_mut_vec(),
+        };
+        let ret = f(g.buf);
+        if str::from_utf8(&g.buf[g.len..]).is_err() {
+            ret.and_then(|_| {
+                Err(io::Error::new(
+                    io::ErrorKind::InvalidData,
+                    "stream did not contain valid UTF-8",
+                ))
+            })
+        } else {
+            g.len = g.buf.len();
+            ret
+        }
     }
 }