diff --git a/Cargo.toml b/Cargo.toml
index 3e0fcc16923..7917d341a84 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,8 +24,10 @@ kdf-all = ["kdf-sha256", "kdf-sha384", "kdf-sha512"]
 kdf-sha256 = []
 kdf-sha384 = []
 kdf-sha512 = []
-kem-all = ["kem-dh-p256-hkdf-sha256", "kem-x25519-hkdf-sha256"]
+kem-all = ["kem-dh-p256-hkdf-sha256", "kem-dh-p384-hkdf-sha384", "kem-dh-p521-hkdf-sha512", "kem-x25519-hkdf-sha256"]
 kem-dh-p256-hkdf-sha256 = ["hpke/p256"]
+kem-dh-p384-hkdf-sha384 = ["hpke/p384"]
+kem-dh-p521-hkdf-sha512 = ["hpke/p521"]
 kem-x25519-hkdf-sha256 = ["hpke/x25519"]
 
 [dependencies]
diff --git a/README.md b/README.md
index 981d0454575..251dc7c0e5f 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,8 @@ from rust, even when opting out of `algo-all`.
 * *kdf-all*: Enables `kdf-sha256`, `kdf-sha384`, `kdf-sha512`
   algorithm features. Enabled by default.
 
-* *kem-all*: Enables both `kem-dh-p256-hkdf-sha256` and
+* *kem-all*: Enables `kem-dh-p256-hkdf-sha256`,
+ `kem-dh-p384-hkdf-sha384`, `kem-dh-p521-hkdf-sha512`, and
  `kem-x25519-hkdf-sha256` algorithm features. Enabled by default.
 
 * *serde*: enables derived serde serialization and deserialization for
diff --git a/src/kem.rs b/src/kem.rs
index a63ff564136..5cd2201ec43 100644
--- a/src/kem.rs
+++ b/src/kem.rs
@@ -7,7 +7,7 @@ use wasm_bindgen::prelude::*;
 
 /**
 Kem represents an asymmetric key encapsulation mechanism, as per
-[RFC9180§7.1][section-7.1]. Currently only two of options listed in
+[RFC9180§7.1][section-7.1]. Currently only four of the options listed in
 the hpke draft are available.
 
 [section-7.1]: https://www.rfc-editor.org/rfc/rfc9180.html#section-7.1
@@ -27,6 +27,14 @@ pub enum Kem {
     #[cfg(feature = "kem-dh-p256-hkdf-sha256")]
     DhP256HkdfSha256 = 16,
 
+    /// DHKEM(P-384, HKDF-SHA384) [NISTCurves](https://doi.org/10.6028/nist.fips.186-4)
+    #[cfg(feature = "kem-dh-p384-hkdf-sha384")]
+    DhP384HkdfSha384 = 17,
+
+    /// DHKEM(P-521, HKDF-SHA512) [NISTCurves](https://doi.org/10.6028/nist.fips.186-4)
+    #[cfg(feature = "kem-dh-p521-hkdf-sha512")]
+    DhP521HkdfSha512 = 18,
+
     /// DHKEM(X25519, HKDF-SHA256) [RFC7748](https://www.rfc-editor.org/info/rfc7748)
     #[cfg(feature = "kem-x25519-hkdf-sha256")]
     X25519HkdfSha256 = 32,
@@ -41,6 +49,14 @@ impl FromStr for Kem {
             "p256sha256" | "dhkemp256hkdfsha256" | "p256hkdfsha256" | "dhkem(p256, hkdfsha256)" => {
                 Ok(Self::DhP256HkdfSha256)
             }
+            #[cfg(feature = "kem-dh-p384-hkdf-sha384")]
+            "p384sha384" | "dhkemp384hkdfsha384" | "p384hkdfsha384" | "dhkem(p384, hkdfsha384)" => {
+                Ok(Self::DhP384HkdfSha384)
+            }
+            #[cfg(feature = "kem-dh-p521-hkdf-sha512")]
+            "p521sha512" | "dhkemp521hkdfsha512" | "p521hkdfsha512" | "dhkem(p521, hkdfsha512)" => {
+                Ok(Self::DhP521HkdfSha512)
+            }
             #[cfg(feature = "kem-x25519-hkdf-sha256")]
             "x25519sha256"
             | "dhkemx25519hkdfsha256"
@@ -63,6 +79,10 @@ impl Kem {
 pub const KEM_ALL: &[Kem] = &[
     #[cfg(feature = "kem-dh-p256-hkdf-sha256")]
     Kem::DhP256HkdfSha256,
+    #[cfg(feature = "kem-dh-p384-hkdf-sha384")]
+    Kem::DhP384HkdfSha384,
+    #[cfg(feature = "kem-dh-p521-hkdf-sha512")]
+    Kem::DhP521HkdfSha512,
     #[cfg(feature = "kem-x25519-hkdf-sha256")]
     Kem::X25519HkdfSha256,
 ];
diff --git a/src/keypair.rs b/src/keypair.rs
index d42c8460585..ac73c357086 100644
--- a/src/keypair.rs
+++ b/src/keypair.rs
@@ -40,6 +40,12 @@ pub fn gen_keypair(kem: Kem) -> Keypair {
         #[cfg(feature = "kem-dh-p256-hkdf-sha256")]
         Kem::DhP256HkdfSha256 => gen_kp::<hpke::kem::DhP256HkdfSha256>(),
 
+        #[cfg(feature = "kem-dh-p384-hkdf-sha384")]
+        Kem::DhP384HkdfSha384 => gen_kp::<hpke::kem::DhP384HkdfSha384>(),
+
+        #[cfg(feature = "kem-dh-p521-hkdf-sha512")]
+        Kem::DhP521HkdfSha512 => gen_kp::<hpke::kem::DhP521HkdfSha512>(),
+
         #[cfg(feature = "kem-x25519-hkdf-sha256")]
         Kem::X25519HkdfSha256 => gen_kp::<hpke::kem::X25519HkdfSha256>(),
     }
diff --git a/src/macros.rs b/src/macros.rs
index 75dd1fc442a..cd89a551e6e 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -33,6 +33,10 @@ macro_rules! match_algo {
         match $kem {
             #[cfg(feature = "kem-dh-p256-hkdf-sha256")]
             $crate::Kem::DhP256HkdfSha256 => $fn::<$aead, $kdf, hpke::kem::DhP256HkdfSha256>,
+            #[cfg(feature = "kem-dh-p384-hkdf-sha384")]
+            $crate::Kem::DhP384HkdfSha384 => $fn::<$aead, $kdf, hpke::kem::DhP384HkdfSha384>,
+            #[cfg(feature = "kem-dh-p521-hkdf-sha512")]
+            $crate::Kem::DhP521HkdfSha512 => $fn::<$aead, $kdf, hpke::kem::DhP521HkdfSha512>,
             #[cfg(feature = "kem-x25519-hkdf-sha256")]
             $crate::Kem::X25519HkdfSha256 => $fn::<$aead, $kdf, hpke::kem::X25519HkdfSha256>,
         }