diff --git a/Cargo.lock b/Cargo.lock
index b6ff067..253a327 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -200,6 +200,37 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
 
+[[package]]
+name = "defmt"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2953bfe4f93bbd20cc71198842756f77d161884c99ebbabc41d80231ded88d1"
+dependencies = [
+ "bitflags",
+ "defmt-macros",
+]
+
+[[package]]
+name = "defmt-macros"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bad9c72e7ca2137e0dc3813245a0d282fd6daad32fd800af018306a9169b5fe8"
+dependencies = [
+ "defmt-parser",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "defmt-parser"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
+dependencies = [
+ "thiserror",
+]
+
 [[package]]
 name = "either"
 version = "1.18.0"
@@ -525,6 +556,7 @@ dependencies = [
  "borsh",
  "bytes",
  "criterion",
+ "defmt",
  "malloc_size_of",
  "serde_core",
  "serde_test",
@@ -558,6 +590,26 @@ version = "0.16.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c13547615a44dc9c452a8a534638acdf07120d4b6847c8178705da06306a3057"
 
+[[package]]
+name = "thiserror"
+version = "2.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec86235f5fcc2a73650310756d2ac5b138a5780bbbdfae3eeccec992c435ba4f"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "2.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc04cd3e1236dd4a98afca4569f2deb3f120e5422a4023be2cb683f8486292af"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 3.0.3",
+]
+
 [[package]]
 name = "tinytemplate"
 version = "1.2.1"
diff --git a/Cargo.toml b/Cargo.toml
index 5d4fb1c..db5fa38 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,8 +9,6 @@ repository = "https://github.com/servo/rust-smallvec"
 description = "'Small vector' optimization: store up to a small number of items on the stack"
 keywords = ["small", "vec", "vector", "stack", "no_std"]
 categories = ["data-structures"]
-readme = "README.md"
-documentation = "https://docs.rs/smallvec/"
 exclude = [".gitignore", "tests/", "fuzz/", "benches/", ".github/"]
 
 [features]
@@ -21,15 +19,16 @@ serde = ["dep:serde_core"]
 internals = []
 
 [dependencies]
-arbitrary = { version = "1", optional = true, default-features = false }
+arbitrary = { version = "1.4", optional = true, default-features = false }
 borsh = { version = "1.8", optional = true, default-features = false }
-bytes = { version = "1", optional = true, default-features = false }
-serde_core = { version = "1.0.221", optional = true, default-features = false }
-malloc_size_of = { version = "0.1.1", optional = true, default-features = false }
+bytes = { version = "1.12", optional = true, default-features = false }
+defmt = { version = "1.1", optional = true, default-features = false}
+serde_core = { version = "1.0", optional = true, default-features = false }
+malloc_size_of = { version = "0.1", optional = true, default-features = false }
 
 [dev-dependencies]
 serde_test = "1.0"
-criterion = "0.4.0"
+criterion = "0.4"
 
 [[test]]
 name = "arbitrary"
diff --git a/src/lib.rs b/src/lib.rs
index 7a5b656..de6c3f8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -60,9 +60,9 @@
 #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
 
 #[doc(hidden)]
-pub extern crate alloc;
+extern crate alloc;
 
-#[cfg(any(test, feature = "std"))]
+#[cfg(feature = "std")]
 extern crate std;
 
 #[cfg(feature = "borsh")]
@@ -74,6 +74,12 @@ use bytes::{
     BufMut,
     buf::UninitSlice
 };
+#[cfg(feature = "defmt")]
+use defmt::{
+    Format,
+    Formatter as DeFormatter,
+    write as dewrite
+};
 #[cfg(feature = "malloc_size_of")]
 use malloc_size_of::{
     MallocShallowSizeOf,
@@ -3201,3 +3207,10 @@ unsafe impl<const N: usize> BufMut for SmallVec<u8, N> {
         self.resize(new_len, val);
     }
 }
+
+#[cfg(feature = "defmt")]
+impl<T: Format, const N: usize> Format for SmallVec<T, N> {
+    fn format(&self, fmt: DeFormatter) {
+        dewrite!(fmt, "{=[?]}", self.as_ref());
+    }
+}