diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df6bf412c..4b8dcf189 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,7 +44,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           # Here, it does not trigger a PR from dependabot.
-          toolchain: 1.43.1
+          toolchain: 1.63.0
       - run: cargo no-dev-deps check
 
   test:
diff --git a/Cargo.toml b/Cargo.toml
index 7fb6a3980..800614657 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ categories = ["algorithms", "rust-patterns", "no-std", "no-std::no-alloc"]
 edition = "2018"
 
 # When bumping, please resolve all `#[allow(clippy::*)]` that are newly resolvable.
-rust-version = "1.43.1"
+rust-version = "1.63.0"
 
 [lib]
 bench = false
diff --git a/src/lib.rs b/src/lib.rs
index 0e7e68fb8..b98e03f29 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -46,7 +46,7 @@
 //!
 //! ## Rust Version
 //!
-//! This version of itertools requires Rust 1.43.1 or later.
+//! This version of itertools requires Rust 1.63.0 or later.
 
 #[cfg(not(feature = "use_std"))]
 extern crate core as std;