diff --git a/Cargo.toml b/Cargo.toml
index a8ea1db..247c41c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,9 @@ failure = "0.1.3"
 # Note: hashbrown is going to be merged into Rust std
 hashbrown = "0.1.7"
 sha2 = "0.8.0"
-hmac = "0.7.0"
-pbkdf2 = { version = "0.3.0", features=["parallel"], default-features = false }
+ring = "0.14.3"
 rand = "0.6.1"
-once_cell = { version = "0.1.6", features = [ "parking_lot" ] }
\ No newline at end of file
+once_cell = { version = "0.1.6", features = [ "parking_lot" ] }
+
+[dev-dependencies]
+hex = "0.3.2"
\ No newline at end of file
diff --git a/src/crypto.rs b/src/crypto.rs
index 636f485..e6ffae9 100644
--- a/src/crypto.rs
+++ b/src/crypto.rs
@@ -5,12 +5,11 @@
 //! [Seed]: ../seed/struct.Seed.html
 //!
 
-extern crate rand;
-use self::rand::{ thread_rng, RngCore };
+use rand::{ thread_rng, RngCore };
+use ring::{digest, pbkdf2};
 use sha2::Digest;
-use hmac::Hmac;
 
-const PBKDF2_ROUNDS: usize = 2048;
+const PBKDF2_ROUNDS: u32 = 2048;
 const PBKDF2_BYTES: usize = 64;
 
 /// SHA256 helper function, internal to the crate
@@ -36,8 +35,9 @@ pub(crate) fn gen_random_bytes(byte_length: usize) -> Vec<u8> {
 ///
 pub(crate) fn pbkdf2(input: &[u8], salt: &str) -> Vec<u8> {
     let mut seed = vec![0u8; PBKDF2_BYTES];
+    static DIGEST_ALG: &'static digest::Algorithm = &digest::SHA512;
 
-    pbkdf2::pbkdf2::<Hmac<sha2::Sha512>>(input, salt.as_bytes(), PBKDF2_ROUNDS, &mut seed);
+    pbkdf2::derive(DIGEST_ALG, std::num::NonZeroU32::new(PBKDF2_ROUNDS).unwrap(), salt.as_bytes(), input, &mut seed);
 
     seed
 }
diff --git a/src/lib.rs b/src/lib.rs
index fad576c..d344a7a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -29,10 +29,10 @@
 //!
 #[macro_use] extern crate failure;
 #[macro_use] extern crate once_cell;
-extern crate pbkdf2;
 extern crate hashbrown;
 extern crate sha2;
-extern crate hmac;
+extern crate ring;
+extern crate rand;
 
 mod mnemonic;
 mod error;
diff --git a/tests/standard-vectors.rs b/tests/standard-vectors.rs
new file mode 100644
index 0000000..cd22a6c
--- /dev/null
+++ b/tests/standard-vectors.rs
@@ -0,0 +1,194 @@
+extern crate bip39;
+extern crate hex;
+
+use ::bip39::{Mnemonic, Language, Seed};
+
+fn test_mnemonic(entropy_hex: &str, expected_phrase: &str) {
+    let entropy_bytes = hex::decode(entropy_hex).unwrap();
+    let mnemonic = Mnemonic::from_entropy(entropy_bytes.as_slice(), Language::English);
+
+    assert!(mnemonic.is_ok());
+    assert_eq!(mnemonic.unwrap().phrase(), expected_phrase);
+}
+
+fn test_seed(phrase: &str, password: &str, expected_seed_hex: &str) {
+    let mnemonic = Mnemonic::from_phrase(phrase, Language::English);
+
+    assert!(mnemonic.is_ok());
+
+    let seed = Seed::new(&mnemonic.unwrap(), password);
+    let actual_seed_bytes: &[u8] = seed.as_bytes();
+    let expected_seed_bytes = hex::decode(expected_seed_hex).unwrap();
+
+    assert!(actual_seed_bytes.eq(expected_seed_bytes.as_slice()), "Wrong seed for '{}'", phrase);
+}
+
+macro_rules! tests {
+    ($([$entropy_hex:expr, $phrase:expr, $seed_hex:expr, $xprv:expr]),*) => {
+        mod mnemonic_tests {
+            #[test]
+            fn test_all() {
+                $(
+                    super::test_mnemonic($entropy_hex, $phrase);
+                )*
+            }
+        }
+
+        mod seed_tests {
+            #[test]
+            fn test_all() {
+                $(
+                    super::test_seed($phrase, "TREZOR", $seed_hex);
+                )*
+            }
+        }
+    };
+}
+
+tests! {
+    // https://github.com/trezor/python-mnemonic/blob/master/vectors.json
+    [
+        "00000000000000000000000000000000",
+        "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about",
+        "c55257c360c07c72029aebc1b53c05ed0362ada38ead3e3e9efa3708e53495531f09a6987599d18264c1e1c92f2cf141630c7a3c4ab7c81b2f001698e7463b04",
+        "xprv9s21ZrQH143K3h3fDYiay8mocZ3afhfULfb5GX8kCBdno77K4HiA15Tg23wpbeF1pLfs1c5SPmYHrEpTuuRhxMwvKDwqdKiGJS9XFKzUsAF"
+    ],
+    [
+        "7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f",
+        "legal winner thank year wave sausage worth useful legal winner thank yellow",
+        "2e8905819b8723fe2c1d161860e5ee1830318dbf49a83bd451cfb8440c28bd6fa457fe1296106559a3c80937a1c1069be3a3a5bd381ee6260e8d9739fce1f607",
+        "xprv9s21ZrQH143K2gA81bYFHqU68xz1cX2APaSq5tt6MFSLeXnCKV1RVUJt9FWNTbrrryem4ZckN8k4Ls1H6nwdvDTvnV7zEXs2HgPezuVccsq"
+    ],
+    [
+        "80808080808080808080808080808080",
+        "letter advice cage absurd amount doctor acoustic avoid letter advice cage above",
+        "d71de856f81a8acc65e6fc851a38d4d7ec216fd0796d0a6827a3ad6ed5511a30fa280f12eb2e47ed2ac03b5c462a0358d18d69fe4f985ec81778c1b370b652a8",
+        "xprv9s21ZrQH143K2shfP28KM3nr5Ap1SXjz8gc2rAqqMEynmjt6o1qboCDpxckqXavCwdnYds6yBHZGKHv7ef2eTXy461PXUjBFQg6PrwY4Gzq"
+    ],
+    [
+        "ffffffffffffffffffffffffffffffff",
+        "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong",
+        "ac27495480225222079d7be181583751e86f571027b0497b5b5d11218e0a8a13332572917f0f8e5a589620c6f15b11c61dee327651a14c34e18231052e48c069",
+        "xprv9s21ZrQH143K2V4oox4M8Zmhi2Fjx5XK4Lf7GKRvPSgydU3mjZuKGCTg7UPiBUD7ydVPvSLtg9hjp7MQTYsW67rZHAXeccqYqrsx8LcXnyd"
+    ],
+    [
+        "000000000000000000000000000000000000000000000000",
+        "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon agent",
+        "035895f2f481b1b0f01fcf8c289c794660b289981a78f8106447707fdd9666ca06da5a9a565181599b79f53b844d8a71dd9f439c52a3d7b3e8a79c906ac845fa",
+        "xprv9s21ZrQH143K3mEDrypcZ2usWqFgzKB6jBBx9B6GfC7fu26X6hPRzVjzkqkPvDqp6g5eypdk6cyhGnBngbjeHTe4LsuLG1cCmKJka5SMkmU"
+    ],
+    [
+        "7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f",
+        "legal winner thank year wave sausage worth useful legal winner thank year wave sausage worth useful legal will",
+        "f2b94508732bcbacbcc020faefecfc89feafa6649a5491b8c952cede496c214a0c7b3c392d168748f2d4a612bada0753b52a1c7ac53c1e93abd5c6320b9e95dd",
+        "xprv9s21ZrQH143K3Lv9MZLj16np5GzLe7tDKQfVusBni7toqJGcnKRtHSxUwbKUyUWiwpK55g1DUSsw76TF1T93VT4gz4wt5RM23pkaQLnvBh7"
+    ],
+    [
+        "808080808080808080808080808080808080808080808080",
+        "letter advice cage absurd amount doctor acoustic avoid letter advice cage absurd amount doctor acoustic avoid letter always",
+        "107d7c02a5aa6f38c58083ff74f04c607c2d2c0ecc55501dadd72d025b751bc27fe913ffb796f841c49b1d33b610cf0e91d3aa239027f5e99fe4ce9e5088cd65",
+        "xprv9s21ZrQH143K3VPCbxbUtpkh9pRG371UCLDz3BjceqP1jz7XZsQ5EnNkYAEkfeZp62cDNj13ZTEVG1TEro9sZ9grfRmcYWLBhCocViKEJae"
+    ],
+    [
+        "ffffffffffffffffffffffffffffffffffffffffffffffff",
+        "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo when",
+        "0cd6e5d827bb62eb8fc1e262254223817fd068a74b5b449cc2f667c3f1f985a76379b43348d952e2265b4cd129090758b3e3c2c49103b5051aac2eaeb890a528",
+        "xprv9s21ZrQH143K36Ao5jHRVhFGDbLP6FCx8BEEmpru77ef3bmA928BxsqvVM27WnvvyfWywiFN8K6yToqMaGYfzS6Db1EHAXT5TuyCLBXUfdm"
+    ],
+    [
+        "0000000000000000000000000000000000000000000000000000000000000000",
+        "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art",
+        "bda85446c68413707090a52022edd26a1c9462295029f2e60cd7c4f2bbd3097170af7a4d73245cafa9c3cca8d561a7c3de6f5d4a10be8ed2a5e608d68f92fcc8",
+        "xprv9s21ZrQH143K32qBagUJAMU2LsHg3ka7jqMcV98Y7gVeVyNStwYS3U7yVVoDZ4btbRNf4h6ibWpY22iRmXq35qgLs79f312g2kj5539ebPM"
+    ],
+    [
+        "7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7f",
+        "legal winner thank year wave sausage worth useful legal winner thank year wave sausage worth useful legal winner thank year wave sausage worth title",
+        "bc09fca1804f7e69da93c2f2028eb238c227f2e9dda30cd63699232578480a4021b146ad717fbb7e451ce9eb835f43620bf5c514db0f8add49f5d121449d3e87",
+        "xprv9s21ZrQH143K3Y1sd2XVu9wtqxJRvybCfAetjUrMMco6r3v9qZTBeXiBZkS8JxWbcGJZyio8TrZtm6pkbzG8SYt1sxwNLh3Wx7to5pgiVFU"
+    ],
+    [
+        "8080808080808080808080808080808080808080808080808080808080808080",
+        "letter advice cage absurd amount doctor acoustic avoid letter advice cage absurd amount doctor acoustic avoid letter advice cage absurd amount doctor acoustic bless",
+        "c0c519bd0e91a2ed54357d9d1ebef6f5af218a153624cf4f2da911a0ed8f7a09e2ef61af0aca007096df430022f7a2b6fb91661a9589097069720d015e4e982f",
+        "xprv9s21ZrQH143K3CSnQNYC3MqAAqHwxeTLhDbhF43A4ss4ciWNmCY9zQGvAKUSqVUf2vPHBTSE1rB2pg4avopqSiLVzXEU8KziNnVPauTqLRo"
+    ],
+    [
+        "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+        "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo vote",
+        "dd48c104698c30cfe2b6142103248622fb7bb0ff692eebb00089b32d22484e1613912f0a5b694407be899ffd31ed3992c456cdf60f5d4564b8ba3f05a69890ad",
+        "xprv9s21ZrQH143K2WFF16X85T2QCpndrGwx6GueB72Zf3AHwHJaknRXNF37ZmDrtHrrLSHvbuRejXcnYxoZKvRquTPyp2JiNG3XcjQyzSEgqCB"
+    ],
+    [
+        "9e885d952ad362caeb4efe34a8e91bd2",
+        "ozone drill grab fiber curtain grace pudding thank cruise elder eight picnic",
+        "274ddc525802f7c828d8ef7ddbcdc5304e87ac3535913611fbbfa986d0c9e5476c91689f9c8a54fd55bd38606aa6a8595ad213d4c9c9f9aca3fb217069a41028",
+        "xprv9s21ZrQH143K2oZ9stBYpoaZ2ktHj7jLz7iMqpgg1En8kKFTXJHsjxry1JbKH19YrDTicVwKPehFKTbmaxgVEc5TpHdS1aYhB2s9aFJBeJH"
+    ],
+    [
+        "6610b25967cdcca9d59875f5cb50b0ea75433311869e930b",
+        "gravity machine north sort system female filter attitude volume fold club stay feature office ecology stable narrow fog",
+        "628c3827a8823298ee685db84f55caa34b5cc195a778e52d45f59bcf75aba68e4d7590e101dc414bc1bbd5737666fbbef35d1f1903953b66624f910feef245ac",
+        "xprv9s21ZrQH143K3uT8eQowUjsxrmsA9YUuQQK1RLqFufzybxD6DH6gPY7NjJ5G3EPHjsWDrs9iivSbmvjc9DQJbJGatfa9pv4MZ3wjr8qWPAK"
+    ],
+    [
+        "68a79eaca2324873eacc50cb9c6eca8cc68ea5d936f98787c60c7ebc74e6ce7c",
+        "hamster diagram private dutch cause delay private meat slide toddler razor book happy fancy gospel tennis maple dilemma loan word shrug inflict delay length",
+        "64c87cde7e12ecf6704ab95bb1408bef047c22db4cc7491c4271d170a1b213d20b385bc1588d9c7b38f1b39d415665b8a9030c9ec653d75e65f847d8fc1fc440",
+        "xprv9s21ZrQH143K2XTAhys3pMNcGn261Fi5Ta2Pw8PwaVPhg3D8DWkzWQwjTJfskj8ofb81i9NP2cUNKxwjueJHHMQAnxtivTA75uUFqPFeWzk"
+    ],
+    [
+        "c0ba5a8e914111210f2bd131f3d5e08d",
+        "scheme spot photo card baby mountain device kick cradle pact join borrow",
+        "ea725895aaae8d4c1cf682c1bfd2d358d52ed9f0f0591131b559e2724bb234fca05aa9c02c57407e04ee9dc3b454aa63fbff483a8b11de949624b9f1831a9612",
+        "xprv9s21ZrQH143K3FperxDp8vFsFycKCRcJGAFmcV7umQmcnMZaLtZRt13QJDsoS5F6oYT6BB4sS6zmTmyQAEkJKxJ7yByDNtRe5asP2jFGhT6"
+    ],
+    [
+        "6d9be1ee6ebd27a258115aad99b7317b9c8d28b6d76431c3",
+        "horn tenant knee talent sponsor spell gate clip pulse soap slush warm silver nephew swap uncle crack brave",
+        "fd579828af3da1d32544ce4db5c73d53fc8acc4ddb1e3b251a31179cdb71e853c56d2fcb11aed39898ce6c34b10b5382772db8796e52837b54468aeb312cfc3d",
+        "xprv9s21ZrQH143K3R1SfVZZLtVbXEB9ryVxmVtVMsMwmEyEvgXN6Q84LKkLRmf4ST6QrLeBm3jQsb9gx1uo23TS7vo3vAkZGZz71uuLCcywUkt"
+    ],
+    [
+        "9f6a2878b2520799a44ef18bc7df394e7061a224d2c33cd015b157d746869863",
+        "panda eyebrow bullet gorilla call smoke muffin taste mesh discover soft ostrich alcohol speed nation flash devote level hobby quick inner drive ghost inside",
+        "72be8e052fc4919d2adf28d5306b5474b0069df35b02303de8c1729c9538dbb6fc2d731d5f832193cd9fb6aeecbc469594a70e3dd50811b5067f3b88b28c3e8d",
+        "xprv9s21ZrQH143K2WNnKmssvZYM96VAr47iHUQUTUyUXH3sAGNjhJANddnhw3i3y3pBbRAVk5M5qUGFr4rHbEWwXgX4qrvrceifCYQJbbFDems"
+    ],
+    [
+        "23db8160a31d3e0dca3688ed941adbf3",
+        "cat swing flag economy stadium alone churn speed unique patch report train",
+        "deb5f45449e615feff5640f2e49f933ff51895de3b4381832b3139941c57b59205a42480c52175b6efcffaa58a2503887c1e8b363a707256bdd2b587b46541f5",
+        "xprv9s21ZrQH143K4G28omGMogEoYgDQuigBo8AFHAGDaJdqQ99QKMQ5J6fYTMfANTJy6xBmhvsNZ1CJzRZ64PWbnTFUn6CDV2FxoMDLXdk95DQ"
+    ],
+    [
+        "8197a4a47f0425faeaa69deebc05ca29c0a5b5cc76ceacc0",
+        "light rule cinnamon wrap drastic word pride squirrel upgrade then income fatal apart sustain crack supply proud access",
+        "4cbdff1ca2db800fd61cae72a57475fdc6bab03e441fd63f96dabd1f183ef5b782925f00105f318309a7e9c3ea6967c7801e46c8a58082674c860a37b93eda02",
+        "xprv9s21ZrQH143K3wtsvY8L2aZyxkiWULZH4vyQE5XkHTXkmx8gHo6RUEfH3Jyr6NwkJhvano7Xb2o6UqFKWHVo5scE31SGDCAUsgVhiUuUDyh"
+    ],
+    [
+        "066dca1a2bb7e8a1db2832148ce9933eea0f3ac9548d793112d9a95c9407efad",
+        "all hour make first leader extend hole alien behind guard gospel lava path output census museum junior mass reopen famous sing advance salt reform",
+        "26e975ec644423f4a4c4f4215ef09b4bd7ef924e85d1d17c4cf3f136c2863cf6df0a475045652c57eb5fb41513ca2a2d67722b77e954b4b3fc11f7590449191d",
+        "xprv9s21ZrQH143K3rEfqSM4QZRVmiMuSWY9wugscmaCjYja3SbUD3KPEB1a7QXJoajyR2T1SiXU7rFVRXMV9XdYVSZe7JoUXdP4SRHTxsT1nzm"
+    ],
+    [
+        "f30f8c1da665478f49b001d94c5fc452",
+        "vessel ladder alter error federal sibling chat ability sun glass valve picture",
+        "2aaa9242daafcee6aa9d7269f17d4efe271e1b9a529178d7dc139cd18747090bf9d60295d0ce74309a78852a9caadf0af48aae1c6253839624076224374bc63f",
+        "xprv9s21ZrQH143K2QWV9Wn8Vvs6jbqfF1YbTCdURQW9dLFKDovpKaKrqS3SEWsXCu6ZNky9PSAENg6c9AQYHcg4PjopRGGKmdD313ZHszymnps"
+    ],
+    [
+        "c10ec20dc3cd9f652c7fac2f1230f7a3c828389a14392f05",
+        "scissors invite lock maple supreme raw rapid void congress muscle digital elegant little brisk hair mango congress clump",
+        "7b4a10be9d98e6cba265566db7f136718e1398c71cb581e1b2f464cac1ceedf4f3e274dc270003c670ad8d02c4558b2f8e39edea2775c9e232c7cb798b069e88",
+        "xprv9s21ZrQH143K4aERa2bq7559eMCCEs2QmmqVjUuzfy5eAeDX4mqZffkYwpzGQRE2YEEeLVRoH4CSHxianrFaVnMN2RYaPUZJhJx8S5j6puX"
+    ],
+    [
+        "f585c11aec520db57dd353c69554b21a89b20fb0650966fa0a9d6f74fd989d8f",
+        "void come effort suffer camp survey warrior heavy shoot primary clutch crush open amazing screen patrol group space point ten exist slush involve unfold",
+        "01f5bced59dec48e362f2c45b5de68b9fd6c92c6634f44d6d40aab69056506f0e35524a518034ddc1192e1dacd32c1ed3eaa3c3b131c88ed8e7e54c49a5d0998",
+        "xprv9s21ZrQH143K39rnQJknpH1WEPFJrzmAqqasiDcVrNuk926oizzJDDQkdiTvNPr2FYDYzWgiMiC63YmfPAa2oPyNB23r2g7d1yiK6WpqaQS"
+    ]
+}