diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fc3e96cf..644ac35f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ env:
   # When updating this, also update:
   # - crates/teloxide-core/src/codegen.rs
   # - rust-toolchain.toml
-  rust_nightly: nightly-2022-12-23
+  rust_nightly: nightly-2023-05-28
   # When updating this, also update:
   # - **/README.md
   # - **/src/lib.rs
@@ -88,7 +88,7 @@ jobs:
             toolchain: beta
             features: "--features full"
           - rust: nightly
-            toolchain: nightly-2022-12-23
+            toolchain: nightly-2023-05-28
             features: "--features full nightly"
           - rust: msrv
             toolchain: 1.64.0
diff --git a/crates/teloxide-core/src/codegen.rs b/crates/teloxide-core/src/codegen.rs
index fe956bce..afde1663 100644
--- a/crates/teloxide-core/src/codegen.rs
+++ b/crates/teloxide-core/src/codegen.rs
@@ -23,7 +23,7 @@ use xshell::{cmd, Shell};
 
 fn ensure_rustfmt(sh: &Shell) {
     // FIXME(waffle): find a better way to set toolchain
-    let toolchain = "nightly-2022-12-23";
+    let toolchain = "nightly-2023-05-28";
 
     let version = cmd!(sh, "rustup run {toolchain} rustfmt --version").read().unwrap_or_default();
 
@@ -36,7 +36,7 @@ fn ensure_rustfmt(sh: &Shell) {
 }
 
 pub fn reformat(text: String) -> String {
-    let toolchain = "nightly-2022-12-23";
+    let toolchain = "nightly-2023-05-28";
 
     let sh = Shell::new().unwrap();
     ensure_rustfmt(&sh);
diff --git a/crates/teloxide-core/src/net/download.rs b/crates/teloxide-core/src/net/download.rs
index ac419a79..338fd547 100644
--- a/crates/teloxide-core/src/net/download.rs
+++ b/crates/teloxide-core/src/net/download.rs
@@ -12,10 +12,9 @@ use tokio::io::{AsyncWrite, AsyncWriteExt};
 use crate::{errors::DownloadError, net::file_url};
 
 /// A trait for downloading files from Telegram.
-pub trait Download<'w>
-/* FIXME(waffle): ideally, this lifetime ('w) shouldn't be here, but we can't help it without
- * GATs */
-{
+// FIXME(waffle): ideally, this lifetime ('w) shouldn't be here, but we can't
+//                help it without GATs
+pub trait Download<'w> {
     /// An error returned from [`download_file`](Self::download_file).
     type Err;
 
diff --git a/crates/teloxide/examples/dispatching_features.rs b/crates/teloxide/examples/dispatching_features.rs
index 6ce059d9..83efc6e9 100644
--- a/crates/teloxide/examples/dispatching_features.rs
+++ b/crates/teloxide/examples/dispatching_features.rs
@@ -40,7 +40,7 @@ async fn main() {
             .endpoint(|msg: Message, bot: Bot, cmd: MaintainerCommands| async move {
                 match cmd {
                     MaintainerCommands::Rand { from, to } => {
-                        let mut rng = rand::rngs::OsRng::default();
+                        let mut rng = rand::rngs::OsRng;
                         let value: u64 = rng.gen_range(from..=to);
 
                         bot.send_message(msg.chat.id, value.to_string()).await?;
diff --git a/crates/teloxide/src/dispatching.rs b/crates/teloxide/src/dispatching.rs
index bb1e9d94..a4d9b6ce 100644
--- a/crates/teloxide/src/dispatching.rs
+++ b/crates/teloxide/src/dispatching.rs
@@ -229,7 +229,7 @@ pub mod update_listeners {
 ///
 /// [`teloxide::repls`]: crate::repls
 #[deprecated = "This module was moved. Use `teloxide::repls` instead."]
-#[cfg(all(feature = "ctrlc_handler"))]
+#[cfg(feature = "ctrlc_handler")]
 pub mod repls {
     pub use crate::repls::*;
 }
diff --git a/crates/teloxide/src/lib.rs b/crates/teloxide/src/lib.rs
index ffcd8f65..1a1c6797 100644
--- a/crates/teloxide/src/lib.rs
+++ b/crates/teloxide/src/lib.rs
@@ -69,7 +69,7 @@ pub use repls::{commands_repl, commands_repl_with_listener};
 pub mod dispatching;
 pub mod error_handlers;
 pub mod prelude;
-#[cfg(all(feature = "ctrlc_handler"))]
+#[cfg(feature = "ctrlc_handler")]
 pub mod repls;
 pub mod stop;
 pub mod update_listeners;
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 2cbd2d33..c58ff624 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly-2022-12-23"
+channel = "nightly-2023-05-28"
 components = ["rustfmt", "clippy"]
 profile = "minimal"