--- a/Cargo.toml
+++ b/Cargo.toml
@@ -377,7 +377,7 @@ clap_complete = "4.4"
 clap_mangen = "0.2"
 compare = "0.1.0"
 crossterm = { version = "0.29.0", default-features = false }
-ctor = "0.6.0"
+ctor = "1"
 ctrlc = { version = "3.4.7", features = ["termination"] }
 dns-lookup = { version = "3.0.0" }
 exacl = "0.12.0"
--- a/src/uu/stdbuf/src/libstdbuf/src/libstdbuf.rs
+++ b/src/uu/stdbuf/src/libstdbuf/src/libstdbuf.rs
@@ -10,7 +10,7 @@ use std::env;
 use std::ptr;
 
 // This runs automatically when the library is loaded via LD_PRELOAD
-#[ctor]
+#[ctor(unsafe)]
 fn init() {
     unsafe { __stdbuf() };
 }
--- a/tests/test_uudoc.rs
+++ b/tests/test_uudoc.rs
@@ -23,7 +23,7 @@ pub const TESTS_BINARY: &str = env!("CAR
 // Set the environment variable for any tests
 
 // Use the ctor attribute to run this function before any tests
-#[ctor::ctor]
+#[ctor::ctor(unsafe)]
 fn init() {
     // No need for unsafe here
     unsafe {
--- a/tests/test_util_name.rs
+++ b/tests/test_util_name.rs
@@ -16,7 +16,7 @@ pub const TESTS_BINARY: &str = env!("CAR
 // Set the environment variable for any tests
 
 // Use the ctor attribute to run this function before any tests
-#[ctor::ctor]
+#[ctor::ctor(unsafe)]
 fn init() {
     // No need for unsafe here
     unsafe {
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -8,7 +8,7 @@ use std::env;
 pub const TESTS_BINARY: &str = env!("CARGO_BIN_EXE_coreutils");
 
 // Use the ctor attribute to run this function before any tests
-#[ctor::ctor]
+#[ctor::ctor(unsafe)]
 fn init() {
     unsafe {
         // Necessary for uutests to be able to find the binary
--- a/tests/uutests/src/lib/util.rs
+++ b/tests/uutests/src/lib/util.rs
@@ -3196,7 +3196,7 @@ mod tests {
 
     // Create a init for the test with a fake value (not needed)
     #[cfg(test)]
-    #[ctor::ctor]
+    #[ctor::ctor(unsafe)]
     fn init() {
         unsafe {
             env::set_var("UUTESTS_BINARY_PATH", "");