diff --git a/.github/workflows/presubmit.yml b/.github/workflows/presubmit.yml
index 8ce2ead..29a997b 100644
--- a/.github/workflows/presubmit.yml
+++ b/.github/workflows/presubmit.yml
@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       - uses: moonrepo/setup-rust@b8edcc56aab474d90c7cf0bb8beeaf8334c15e9f
         with:
-          channel: '1.74.0'
+          channel: '1.85.0'
       - run: sudo apt-get install libpam0g-dev
       - run: cargo test --all-features
       - run: cargo test --no-default-features
@@ -45,7 +45,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
       - uses: moonrepo/setup-rust@b8edcc56aab474d90c7cf0bb8beeaf8334c15e9f
         with:
-          channel: '1.74.0'
+          channel: '1.85.0'
           bins: cargo-deny
       - run: sudo apt-get install libpam0g-dev
       - run: cargo deny --all-features check licenses
diff --git a/Cargo.toml b/Cargo.toml
index 3aed9f1..dd87e85 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,8 @@ homepage = "https://github.com/shell-pool/shpool_pty"
 license = "MIT"
 description = "Fork with new pseudo-terminal (PTY)"
 keywords = ["pty", "tty", "pseudo", "terminal", "fork"]
+edition = "2024"
+rust-version = "1.85"
 
 [features]
 default       = []
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..5ce4b2d
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,4 @@
+[toolchain]
+channel = "1.85.0"
+components = ["rust-docs", "rust-src", "rust-analyzer"]
+profile = "minimal"
diff --git a/src/fork.rs b/src/fork.rs
index c0ea26f..e07218b 100644
--- a/src/fork.rs
+++ b/src/fork.rs
@@ -152,7 +152,7 @@ impl Fork {
     /// The constructor function `from_ptmx` forks the program
     /// and returns the current pid for a default PTMX's path.
     pub fn from_ptmx() -> Result<Self> {
-        Fork::new(::DEFAULT_PTMX)
+        Fork::new(crate::DEFAULT_PTMX)
     }
 
     /// Waits until it's terminated.