diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0cb846a..66d27e6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 - 
 
+## 1.19.0
+
+- Use `portable-atomic` instead of `atomic-polyfill`, [#251](https://github.com/matklad/once_cell/pull/251).
+
 ## 1.18.0
 
 - `MSRV` is updated to 1.60.0 to take advantage of `dep:` syntax for cargo features,
diff --git a/Cargo.lock.msrv b/Cargo.lock.msrv
index 08e2a1e..d3f878f 100644
--- a/Cargo.lock.msrv
+++ b/Cargo.lock.msrv
@@ -11,15 +11,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "atomic-polyfill"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c314e70d181aa6053b26e3f7fbf86d1dfff84f816a6175b967666b3506ef7289"
-dependencies = [
- "critical-section",
-]
-
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -52,11 +43,11 @@ checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
 name = "once_cell"
-version = "1.18.0"
+version = "1.19.0"
 dependencies = [
- "atomic-polyfill",
  "critical-section",
  "parking_lot_core",
+ "portable-atomic",
  "regex",
 ]
 
@@ -73,6 +64,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
+
 [[package]]
 name = "redox_syscall"
 version = "0.2.16"
diff --git a/Cargo.toml b/Cargo.toml
index 9d4189b..e41e06e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "once_cell"
-version = "1.18.0"
+version = "1.19.0"
 authors = ["Aleksey Kladov <aleksey.kladov@gmail.com>"]
 license = "MIT OR Apache-2.0"
 edition = "2021"
@@ -21,7 +21,7 @@ members = ["xtask"]
 
 [dependencies]
 parking_lot_core = { version = "0.9.3", optional = true, default_features = false }
-atomic-polyfill = { version = "1", optional = true }
+portable-atomic = { version = "1", optional = true }
 critical-section = { version = "1", optional = true }
 
 [dev-dependencies]
@@ -48,7 +48,7 @@ parking_lot = ["dep:parking_lot_core"]
 # Uses `critical-section` to implement `sync` and `race` modules. in
 # `#![no_std]` mode. Please read `critical-section` docs carefully
 # before enabling this feature.
-critical-section = ["dep:critical-section", "dep:atomic-polyfill" ]
+critical-section = ["dep:critical-section", "portable-atomic" ]
 
 # Enables semver-exempt APIs of this crate.
 # At the moment, this feature is unused.
diff --git a/src/imp_cs.rs b/src/imp_cs.rs
index 04018f1..7d05e50 100644
--- a/src/imp_cs.rs
+++ b/src/imp_cs.rs
@@ -1,6 +1,6 @@
 use core::panic::{RefUnwindSafe, UnwindSafe};
 
-use atomic_polyfill::{AtomicBool, Ordering};
+use portable_atomic::{AtomicBool, Ordering};
 use critical_section::{CriticalSection, Mutex};
 
 use crate::unsync;
diff --git a/src/race.rs b/src/race.rs
index fe36fa1..da8a2fc 100644
--- a/src/race.rs
+++ b/src/race.rs
@@ -20,7 +20,7 @@
 //! architectures versus `Relaxed`.
 
 #[cfg(feature = "critical-section")]
-use atomic_polyfill as atomic;
+use portable_atomic as atomic;
 #[cfg(not(feature = "critical-section"))]
 use core::sync::atomic;