diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6b67dbe3..cc9a693f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -72,18 +72,12 @@ jobs:
         if: matrix.os != 'windows'
 
   build:
-    name: Rust ${{matrix.rust}}
+    name: Rust 1.34.0
     runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        rust: [1.26.0, 1.34.0]
     timeout-minutes: 45
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{matrix.rust}}
+      - uses: dtolnay/rust-toolchain@1.34.0
       - run: cd serde && cargo build --features rc
       - run: cd serde && cargo build --no-default-features
       - run: cd serde && cargo build
diff --git a/README.md b/README.md
index 0ad018e3..6109fdf7 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,12 @@
-# Serde   [![Build Status]][actions] [![Latest Version]][crates.io] [![serde: rustc 1.26+]][Rust 1.26] [![serde_derive: rustc 1.56+]][Rust 1.56]
+# Serde   [![Build Status]][actions] [![Latest Version]][crates.io] [![serde: rustc 1.27+]][Rust 1.27] [![serde_derive: rustc 1.56+]][Rust 1.56]
 
 [Build Status]: https://img.shields.io/github/actions/workflow/status/serde-rs/serde/ci.yml?branch=master
 [actions]: https://github.com/serde-rs/serde/actions?query=branch%3Amaster
 [Latest Version]: https://img.shields.io/crates/v/serde.svg
 [crates.io]: https://crates.io/crates/serde
-[serde: rustc 1.26+]: https://img.shields.io/badge/serde-rustc_1.26+-lightgray.svg
+[serde: rustc 1.27+]: https://img.shields.io/badge/serde-rustc_1.27+-lightgray.svg
 [serde_derive: rustc 1.56+]: https://img.shields.io/badge/serde_derive-rustc_1.56+-lightgray.svg
-[Rust 1.26]: https://blog.rust-lang.org/2018/05/10/Rust-1.26.html
+[Rust 1.27]: https://blog.rust-lang.org/2018/06/21/Rust-1.27.html
 [Rust 1.56]: https://blog.rust-lang.org/2021/10/21/Rust-1.56.0.html
 
 **Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
diff --git a/serde/Cargo.toml b/serde/Cargo.toml
index 65d59b49..6d7a849e 100644
--- a/serde/Cargo.toml
+++ b/serde/Cargo.toml
@@ -11,7 +11,7 @@ keywords = ["serde", "serialization", "no_std"]
 license = "MIT OR Apache-2.0"
 readme = "crates-io.md"
 repository = "https://github.com/serde-rs/serde"
-rust-version = "1.26"
+rust-version = "1.27"
 
 [dependencies]
 serde_derive = { version = "=1.0.179", optional = true, path = "../serde_derive" }
diff --git a/serde/build.rs b/serde/build.rs
index 48e52893..ecbb96a6 100644
--- a/serde/build.rs
+++ b/serde/build.rs
@@ -16,12 +16,9 @@ fn main() {
     let target = env::var("TARGET").unwrap();
     let emscripten = target == "asmjs-unknown-emscripten" || target == "wasm32-unknown-emscripten";
 
-    // Inclusive ranges methods stabilized in Rust 1.27:
-    // https://github.com/rust-lang/rust/pull/50758
-    // Also Iterator::try_for_each:
+    // Iterator::try_for_each stabilized in Rust 1.27:
     // https://blog.rust-lang.org/2018/06/21/Rust-1.27.html#library-stabilizations
     if minor < 27 {
-        println!("cargo:rustc-cfg=no_range_inclusive");
         println!("cargo:rustc-cfg=no_iterator_try_fold");
     }
 
diff --git a/serde/src/de/impls.rs b/serde/src/de/impls.rs
index acb251f7..124251de 100644
--- a/serde/src/de/impls.rs
+++ b/serde/src/de/impls.rs
@@ -2238,7 +2238,6 @@ where
     }
 }
 
-#[cfg(not(no_range_inclusive))]
 impl<'de, Idx> Deserialize<'de> for RangeInclusive<Idx>
 where
     Idx: Deserialize<'de>,
diff --git a/serde/src/lib.rs b/serde/src/lib.rs
index ec4e1ba1..ea0fa472 100644
--- a/serde/src/lib.rs
+++ b/serde/src/lib.rs
@@ -183,7 +183,7 @@ mod lib {
     pub use self::core::fmt::{self, Debug, Display};
     pub use self::core::marker::{self, PhantomData};
     pub use self::core::num::Wrapping;
-    pub use self::core::ops::{Bound, Range, RangeFrom, RangeTo};
+    pub use self::core::ops::{Bound, Range, RangeFrom, RangeInclusive, RangeTo};
     pub use self::core::option::{self, Option};
     pub use self::core::result::{self, Result};
     pub use self::core::time::Duration;
@@ -251,9 +251,6 @@ mod lib {
     #[cfg(feature = "std")]
     pub use std::time::{SystemTime, UNIX_EPOCH};
 
-    #[cfg(not(no_range_inclusive))]
-    pub use self::core::ops::RangeInclusive;
-
     #[cfg(all(feature = "std", no_target_has_atomic, not(no_std_atomic)))]
     pub use std::sync::atomic::{
         AtomicBool, AtomicI16, AtomicI32, AtomicI8, AtomicIsize, AtomicU16, AtomicU32, AtomicU8,
diff --git a/serde/src/ser/impls.rs b/serde/src/ser/impls.rs
index c2f9e78b..f856b6c0 100644
--- a/serde/src/ser/impls.rs
+++ b/serde/src/ser/impls.rs
@@ -274,7 +274,6 @@ where
 
 ////////////////////////////////////////////////////////////////////////////////
 
-#[cfg(not(no_range_inclusive))]
 impl<Idx> Serialize for RangeInclusive<Idx>
 where
     Idx: Serialize,