diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 18852b28..5f6d1d79 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-2023-05-28
+  rust_nightly: nightly-2023-09-27
   # When updating this, also update:
   # - **/README.md
   # - **/src/lib.rs
@@ -84,7 +84,7 @@ jobs:
             toolchain: beta
             features: "--features full"
           - rust: nightly
-            toolchain: nightly-2023-05-28
+            toolchain: nightly-2023-09-27
             features: "--features full nightly"
           - rust: msrv
             toolchain: 1.65.0
diff --git a/crates/teloxide-core/src/codegen.rs b/crates/teloxide-core/src/codegen.rs
index afde1663..f14d3f62 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-2023-05-28";
+    let toolchain = "nightly-2023-09-27";
 
     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-2023-05-28";
+    let toolchain = "nightly-2023-09-27";
 
     let sh = Shell::new().unwrap();
     ensure_rustfmt(&sh);
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index c58ff624..0c8b465f 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly-2023-05-28"
+channel = "nightly-2023-09-27"
 components = ["rustfmt", "clippy"]
 profile = "minimal"