diff --git a/Cargo.lock b/Cargo.lock
index f0c36a567..ed71b73f6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -104,16 +104,6 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "aurora-blake2"
-version = "0.9.1"
-source = "git+https://github.com/aurora-is-near/aurora-blake2.git#05a0b5f7a544c527c0118f8afe2f943b3de4bb03"
-dependencies = [
- "crypto-mac 0.8.0",
- "digest 0.9.0",
- "opaque-debug 0.3.0",
-]
-
 [[package]]
 name = "aurora-bn"
 version = "0.1.0"
@@ -159,7 +149,6 @@ dependencies = [
 name = "aurora-engine-precompiles"
 version = "1.0.0"
 dependencies = [
- "aurora-blake2",
  "aurora-bn",
  "aurora-engine-sdk",
  "aurora-engine-types",
diff --git a/engine-precompiles/Cargo.toml b/engine-precompiles/Cargo.toml
index b05e074b3..1965010b4 100644
--- a/engine-precompiles/Cargo.toml
+++ b/engine-precompiles/Cargo.toml
@@ -16,7 +16,6 @@ autobenches = false
 aurora-engine-types = { path = "../engine-types", default-features = false }
 aurora-engine-sdk = { path = "../engine-sdk", default-features = false }
 base64 = { version = "0.13.0", default-features = false, features = ["alloc"] }
-aurora-blake2 = { git = "https://github.com/aurora-is-near/aurora-blake2.git", version = "0.9.1", default-features = false }
 borsh = { version = "0.8.2", default-features = false }
 bn = { package = "aurora-bn", git = "https://github.com/aurora-is-near/aurora-bn.git", default-features = false }
 evm = { git = "https://github.com/aurora-is-near/sputnikvm.git", rev = "37448b6cacd98b06282cff5a559684505c29bd2b", default-features = false }
@@ -36,7 +35,7 @@ serde_json = "1"
 rand = "0.7.3"
 
 [features]
-std = ["aurora-engine-types/std", "aurora-engine-sdk/std", "borsh/std", "aurora-blake2/std", "bn/std", "evm/std", "evm-core/std", "libsecp256k1/std", "ripemd160/std", "sha2/std", "sha3/std", "ethabi/std"]
+std = ["aurora-engine-types/std", "aurora-engine-sdk/std", "borsh/std", "bn/std", "evm/std", "evm-core/std", "libsecp256k1/std", "ripemd160/std", "sha2/std", "sha3/std", "ethabi/std"]
 contract = []
 log = []
 error_refund = []
diff --git a/engine-precompiles/src/blake2.rs b/engine-precompiles/src/blake2.rs
index 819039b47..d953bd374 100644
--- a/engine-precompiles/src/blake2.rs
+++ b/engine-precompiles/src/blake2.rs
@@ -3,6 +3,7 @@ use evm::{Context, ExitError};
 use crate::prelude::types::EthGas;
 use crate::prelude::{mem, types::Address, Borrowed};
 use crate::{EvmPrecompileResult, Precompile, PrecompileOutput};
+use aurora_engine_types::Vec;
 
 /// Blake2 costs.
 mod costs {
@@ -15,6 +16,116 @@ mod costs {
 /// Blake2 constants.
 mod consts {
     pub(super) const INPUT_LENGTH: usize = 213;
+
+    /// The precomputed SIGMA.
+    ///
+    /// See [RFC 7693](https://datatracker.ietf.org/doc/html/rfc7693#section-2.7) specification for more details.
+    pub(super) const SIGMA: [[usize; 16]; 10] = [
+        [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
+        [14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3],
+        [11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4],
+        [7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8],
+        [9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13],
+        [2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9],
+        [12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11],
+        [13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10],
+        [6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5],
+        [10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0],
+    ];
+
+    /// The initialization vector.
+    ///
+    /// See [RFC 7693](https://tools.ietf.org/html/rfc7693#section-2.6) specification for more details.
+    pub(super) const IV: [u64; 8] = [
+        0x6a09e667f3bcc908,
+        0xbb67ae8584caa73b,
+        0x3c6ef372fe94f82b,
+        0xa54ff53a5f1d36f1,
+        0x510e527fade682d1,
+        0x9b05688c2b3e6c1f,
+        0x1f83d9abfb41bd6b,
+        0x5be0cd19137e2179,
+    ];
+
+    // G rotation constants.
+
+    /// G rotation 1.
+    pub(super) const R1: u32 = 32;
+
+    /// G rotation 2.
+    pub(super) const R2: u32 = 24;
+
+    /// G rotation 3.
+    pub(super) const R3: u32 = 16;
+
+    /// G rotation 4.
+    pub(super) const R4: u32 = 63;
+}
+
+/// The G primitive function which mixes two input worlds, "x" and "y", into
+/// four words indexed by "a", "b", "c", and "d" in the working vector v[0..15].
+///
+/// See [RFC 7693](https://datatracker.ietf.org/doc/html/rfc7693#section-3.1) specification for more
+/// details.
+fn g(v: &mut [u64], a: usize, b: usize, c: usize, d: usize, x: u64, y: u64) {
+    v[a] = v[a].wrapping_add(v[b]).wrapping_add(x);
+    v[d] = (v[d] ^ v[a]).rotate_right(consts::R1);
+    v[c] = v[c].wrapping_add(v[d]);
+    v[b] = (v[b] ^ v[c]).rotate_right(consts::R2);
+    v[a] = v[a].wrapping_add(v[b]).wrapping_add(y);
+    v[d] = (v[d] ^ v[a]).rotate_right(consts::R3);
+    v[c] = v[c].wrapping_add(v[d]);
+    v[b] = (v[b] ^ v[c]).rotate_right(consts::R4);
+}
+
+/// Takes as an argument the state vector `h`, message block vector `m` (the last block is padded
+/// with zeros to full block size, if required), 2w-bit offset counter `t`, and final block
+/// indicator flag `f`. Local vector v[0..15] is used in processing. F returns a new state vector.
+/// The number of rounds, `r`, is 12 for BLAKE2b and 10 for BLAKE2s. Rounds are numbered from 0 to
+/// r - 1.
+///
+/// See [RFC 7693](https://datatracker.ietf.org/doc/html/rfc7693#section-3.2) specification for more
+/// details.
+fn f(mut h: [u64; 8], m: [u64; 16], t: [u64; 2], f: bool, rounds: u32) -> Vec<u8> {
+    // Initialize the work vector.
+    let mut v = [0u64; 16];
+    v[0..8].copy_from_slice(&h); // First half from state.
+    v[8..16].copy_from_slice(&consts::IV); // Second half from IV.
+
+    v[12] ^= t[0]; // Low word of the offset.
+    v[13] ^= t[1]; // High word.
+
+    if f {
+        // last block flag?
+        v[14] = !v[14] // Invert all bits.
+    }
+
+    for i in 0..rounds {
+        // Typically twelve rounds for blake2b.
+        // Message word selection permutation for this round.
+        let s = &consts::SIGMA[i as usize % 10];
+        g(&mut v, 0, 4, 8, 12, m[s[0]], m[s[1]]);
+        g(&mut v, 1, 5, 9, 13, m[s[2]], m[s[3]]);
+        g(&mut v, 2, 6, 10, 14, m[s[4]], m[s[5]]);
+        g(&mut v, 3, 7, 11, 15, m[s[6]], m[s[7]]);
+
+        g(&mut v, 0, 5, 10, 15, m[s[8]], m[s[9]]);
+        g(&mut v, 1, 6, 11, 12, m[s[10]], m[s[11]]);
+        g(&mut v, 2, 7, 8, 13, m[s[12]], m[s[13]]);
+        g(&mut v, 3, 4, 9, 14, m[s[14]], m[s[15]]);
+    }
+
+    for i in 0..8 {
+        // XOR the two halves.
+        h[i] ^= v[i] ^ v[i + 8];
+    }
+
+    let mut result = Vec::with_capacity(64);
+    for value in h {
+        result.extend_from_slice(&value.to_le_bytes());
+    }
+
+    result
 }
 
 pub(super) struct Blake2F;
@@ -94,7 +205,7 @@ impl Precompile for Blake2F {
         }
         let finished = input[212] != 0;
 
-        let output = aurora_blake2::blake2b_f(rounds, h, m, t, finished).to_vec();
+        let output = f(h, m, t, finished, rounds);
         Ok(PrecompileOutput::without_logs(cost, output).into())
     }
 }