diff --git a/metrics-benchmark/Cargo.toml b/metrics-benchmark/Cargo.toml
index 8bbdb876..21dfdaf5 100644
--- a/metrics-benchmark/Cargo.toml
+++ b/metrics-benchmark/Cargo.toml
@@ -12,6 +12,6 @@ pretty_env_logger = "0.4"
 getopts = "0.2"
 hdrhistogram = { version = "7.2", default-features = false }
 quanta = "0.10.0"
-atomic-shim = "0.2"
+portable-atomic = "0.3"
 metrics = { version = "^0.19", path = "../metrics" }
 metrics-util = { version = "^0.13", path = "../metrics-util" }
diff --git a/metrics-benchmark/src/main.rs b/metrics-benchmark/src/main.rs
index 0418bdf6..97d565f2 100644
--- a/metrics-benchmark/src/main.rs
+++ b/metrics-benchmark/src/main.rs
@@ -1,4 +1,3 @@
-use atomic_shim::AtomicU64;
 use getopts::Options;
 use hdrhistogram::Histogram as HdrHistogram;
 use log::{error, info};
@@ -7,6 +6,7 @@ use metrics::{
     Counter, Gauge, Histogram, Key, KeyName, Recorder, SharedString, Unit,
 };
 use metrics_util::registry::{AtomicStorage, Registry};
+use portable_atomic::AtomicU64;
 use quanta::{Clock, Instant as QuantaInstant};
 use std::{
     env,
diff --git a/metrics-exporter-prometheus/Cargo.toml b/metrics-exporter-prometheus/Cargo.toml
index 77ffc934..d49bdfd2 100644
--- a/metrics-exporter-prometheus/Cargo.toml
+++ b/metrics-exporter-prometheus/Cargo.toml
@@ -29,6 +29,7 @@ parking_lot = { version = "0.11", default-features = false }
 thiserror = { version = "1", default-features = false }
 quanta = { version = "0.10.0", default-features = false }
 indexmap = { version = "1", default-features = false }
+portable-atomic = "0.3"
 
 # Optional
 hyper = { version = "0.14", default-features = false, features = ["tcp", "http1"], optional = true }
diff --git a/metrics-exporter-prometheus/src/registry.rs b/metrics-exporter-prometheus/src/registry.rs
index b82cba67..45fc8f29 100644
--- a/metrics-exporter-prometheus/src/registry.rs
+++ b/metrics-exporter-prometheus/src/registry.rs
@@ -1,4 +1,4 @@
-use std::sync::atomic::AtomicU64;
+use portable_atomic::AtomicU64;
 use std::sync::Arc;
 
 use metrics::HistogramFn;
diff --git a/metrics-util/Cargo.toml b/metrics-util/Cargo.toml
index 70ef2c2e..c866aac3 100644
--- a/metrics-util/Cargo.toml
+++ b/metrics-util/Cargo.toml
@@ -50,7 +50,7 @@ required-features = ["handles"]
 metrics = { version = "^0.19", path = "../metrics" }
 crossbeam-epoch = { version = "0.9.2", default-features = false, optional = true, features = ["alloc", "std"] }
 crossbeam-utils = { version = "0.8", default-features = false, optional = true }
-atomic-shim = { version = "0.2", default-features = false, optional = true }
+portable-atomic = { version = "0.3", optional = true }
 aho-corasick = { version = "0.7", default-features = false, optional = true, features = ["std"] }
 indexmap = { version = "1", default-features = false, optional = true }
 parking_lot = { version = "0.11", default-features = false, optional = true }
@@ -90,4 +90,4 @@ layer-filter = ["aho-corasick"]
 layer-router = ["radix_trie"]
 summary = ["sketches-ddsketch"]
 recency = ["parking_lot", "registry", "quanta"]
-registry = ["atomic-shim", "crossbeam-epoch", "crossbeam-utils", "handles", "hashbrown", "num_cpus", "parking_lot"]
+registry = ["portable-atomic", "crossbeam-epoch", "crossbeam-utils", "handles", "hashbrown", "num_cpus", "parking_lot"]
diff --git a/metrics-util/src/registry/mod.rs b/metrics-util/src/registry/mod.rs
index b1dd42bb..b4e2b29f 100644
--- a/metrics-util/src/registry/mod.rs
+++ b/metrics-util/src/registry/mod.rs
@@ -393,8 +393,8 @@ where
 
 #[cfg(test)]
 mod tests {
-    use atomic_shim::AtomicU64;
     use metrics::{CounterFn, Key};
+    use portable_atomic::AtomicU64;
 
     use super::Registry;
     use std::sync::{atomic::Ordering, Arc};
diff --git a/metrics-util/src/registry/storage.rs b/metrics-util/src/registry/storage.rs
index e115c872..a36ffe75 100644
--- a/metrics-util/src/registry/storage.rs
+++ b/metrics-util/src/registry/storage.rs
@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
-use atomic_shim::AtomicU64;
 use metrics::{CounterFn, GaugeFn, HistogramFn};
+use portable_atomic::AtomicU64;
 
 use crate::AtomicBucket;
 
diff --git a/metrics/Cargo.toml b/metrics/Cargo.toml
index 439e85c3..5bec0ca2 100644
--- a/metrics/Cargo.toml
+++ b/metrics/Cargo.toml
@@ -28,7 +28,7 @@ harness = false
 [dependencies]
 metrics-macros = { version = "^0.5", path = "../metrics-macros" }
 ahash = { version = "0.7", default-features = false }
-atomic-shim = "0.2"
+portable-atomic = "0.3"
 
 [dev-dependencies]
 log = "0.4"
diff --git a/metrics/src/handles.rs b/metrics/src/handles.rs
index 0f22db45..fc129278 100644
--- a/metrics/src/handles.rs
+++ b/metrics/src/handles.rs
@@ -1,4 +1,4 @@
-use atomic_shim::AtomicU64;
+use portable_atomic::AtomicU64;
 use std::sync::{atomic::Ordering, Arc};
 
 use crate::IntoF64;
diff --git a/metrics/src/key.rs b/metrics/src/key.rs
index 42dbfda1..1c4033e9 100644
--- a/metrics/src/key.rs
+++ b/metrics/src/key.rs
@@ -1,7 +1,7 @@
 use crate::{cow::Cow, IntoLabels, KeyHasher, Label, SharedString};
 use alloc::{string::String, vec::Vec};
-use atomic_shim::AtomicU64;
 use core::{fmt, hash::Hash, slice::Iter};
+use portable_atomic::AtomicU64;
 use std::{
     cmp,
     hash::Hasher,