diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 38203e9..39892cb 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -10,7 +10,7 @@ jobs:
       matrix:
         rust:
           - stable
-          - 1.63.0
+          - 1.90.0
     steps:
       - uses: r7kamura/rust-problem-matchers@v1
 
@@ -56,4 +56,4 @@ jobs:
         run: cargo test --features ${{ env.all_features }}
 
 env:
-  all_features: "arbitrary,bytemuck,rand,randtest,serde,schemars,proptest,rkyv,rkyv_ck,speedy"
+  all_features: "arbitrary,bytemuck,rand,randtest,serde,schemars,proptest,rkyv,rkyv_ck,speedy,facet"
diff --git a/Cargo.lock b/Cargo.lock
index d5e52a7..9bb8e07 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "ahash"
@@ -129,6 +129,12 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527"
 
+[[package]]
+name = "const-fnv1a-hash"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32b13ea120a812beba79e34316b3942a857c86ec1593cb34f27bb28272ce2cca"
+
 [[package]]
 name = "convert_case"
 version = "0.4.0"
@@ -179,6 +185,72 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "facet"
+version = "0.46.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df488bcda61dde160301ee6bce43d42397db599ffc689381a1873b5f035135f9"
+dependencies = [
+ "autocfg",
+ "facet-core",
+ "facet-macros",
+]
+
+[[package]]
+name = "facet-core"
+version = "0.46.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c33cf9d80307e9a29f93e5a65ddb65b227b5fa082d649c65d4083345f5d398d0"
+dependencies = [
+ "autocfg",
+ "const-fnv1a-hash",
+ "impls",
+]
+
+[[package]]
+name = "facet-macro-parse"
+version = "0.46.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c5ab349bd1823fbfa129e595a826ef7fb4d1b9c7215428b28de18044d009dbc1"
+dependencies = [
+ "facet-macro-types",
+ "proc-macro2",
+ "quote",
+]
+
+[[package]]
+name = "facet-macro-types"
+version = "0.46.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79622a74665b47d1744998dd0d15b73eb0eecdfeb16630b436c5f03365b02e55"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unsynn",
+]
+
+[[package]]
+name = "facet-macros"
+version = "0.46.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6656fc7457975f5e1c86791b7a810c40ba53993823ae655f7c331e808c4b5ff"
+dependencies = [
+ "facet-macros-impl",
+]
+
+[[package]]
+name = "facet-macros-impl"
+version = "0.46.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f462bad2b5a574b2c94e9ad54162704ceacf3200741b4f0fb88020936b9003ec"
+dependencies = [
+ "facet-macro-parse",
+ "facet-macro-types",
+ "proc-macro2",
+ "quote",
+ "unsynn",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.5.0"
@@ -240,6 +312,12 @@ dependencies = [
  "ahash",
 ]
 
+[[package]]
+name = "impls"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a46645bbd70538861a90d0f26c31537cdf1e44aae99a794fb75a664b70951bc"
+
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -308,6 +386,12 @@ dependencies = [
  "syn 2.0.119",
 ]
 
+[[package]]
+name = "mutants"
+version = "0.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc0287524726960e07b119cebd01678f852f147742ae0d925e6a520dca956126"
+
 [[package]]
 name = "num-cmp"
 version = "0.1.0"
@@ -338,6 +422,7 @@ dependencies = [
  "borsh",
  "bytemuck",
  "derive-visitor",
+ "facet",
  "num-cmp",
  "num-traits",
  "proptest",
@@ -636,6 +721,12 @@ dependencies = [
  "syn 3.0.3",
 ]
 
+[[package]]
+name = "rustc-hash"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b1e7f9a428571be2dc5bc0505c13fb6bf936822b894ec87abf8a08a4e51742d"
+
 [[package]]
 name = "rustix"
 version = "1.1.4"
@@ -884,6 +975,17 @@ version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
+[[package]]
+name = "unsynn"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501a7adf1a4bd9951501e5c66621e972ef8874d787628b7f90e64f936ef7ec0a"
+dependencies = [
+ "mutants",
+ "proc-macro2",
+ "rustc-hash",
+]
+
 [[package]]
 name = "version_check"
 version = "0.9.5"
diff --git a/Cargo.toml b/Cargo.toml
index 566ade6..8b6b247 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,13 +12,14 @@ readme      = "README.md"
 keywords    = ["no_std", "ord", "f64", "f32", "sort"]
 categories  = ["science", "rust-patterns", "no-std"]
 edition     = "2021"
-rust-version = "1.63"
+rust-version = "1.90"
 
 [dependencies]
 arbitrary  = { version = "1.0.0", optional = true }
 borsh      = { version = "1.2.0", optional = true, default-features = false }
 bytemuck   = { version = "1.12.2", optional = true, default-features = false }
 derive-visitor = { version = "0.4.0", optional = true }
+facet = { version = "0.46.5", optional = true, default-features = false, features = ["alloc"] }
 num-cmp    = { version = "0.1.0", optional = true }
 num-traits = { version = "0.2.9", default-features = false }
 proptest   = { version = "1.0.0", optional = true }
@@ -35,6 +36,7 @@ serde_test = "1.0"
 
 [features]
 default  = ["std"]
+facet    = ["dep:facet"]
 std      = ["num-traits/std"]
 libm     = ["num-traits/libm"]
 serde    = ["dep:serde", "rand?/serde1"]
diff --git a/src/lib.rs b/src/lib.rs
index 6c2decb..bba21d4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,6 +23,8 @@ use core::ops::{
 };
 use core::str::FromStr;
 
+#[cfg(feature = "facet")]
+use facet::Facet;
 pub use num_traits::float::FloatCore;
 #[cfg(any(feature = "std", feature = "libm"))]
 use num_traits::real::Real;
@@ -88,7 +90,8 @@ pub use impl_rand::{UniformNotNan, UniformOrdered};
     doc = "[`bytemuck`]: https://docs.rs/bytemuck/1/"
 )]
 #[derive(Default, Clone, Copy)]
-#[repr(transparent)]
+#[cfg_attr(feature = "facet", derive(Facet))]
+#[cfg_attr(feature = "facet", facet(transparent))]
 pub struct OrderedFloat<T>(pub T);
 
 #[cfg(feature = "derive-visitor")]
@@ -1254,6 +1257,8 @@ impl<T: FloatCore + Num> Num for OrderedFloat<T> {
     doc = "[`bytemuck`]: https://docs.rs/bytemuck/1/"
 )]
 #[derive(PartialOrd, PartialEq, Default, Clone, Copy)]
+#[cfg_attr(feature = "facet", derive(Facet))]
+#[cfg_attr(feature = "facet", facet(transparent))]
 #[repr(transparent)]
 pub struct NotNan<T>(T);