diff --git a/Cargo.toml b/Cargo.toml
index 7313947..ef5fa53 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,18 +26,16 @@ futures-cpupool = {version = "0.1", optional = true}
 num_cpus = {version = "1", optional = true}
 crossbeam = {version = "0.7.1", optional = true}
 
-tiny-keccak = {version = "1.4.2", optional = true}
 web-sys = {version = "0.3.17", optional = true, features = ["console", "Performance", "Window"]}
 
-[dependencies.blake2-rfc]
-git = "https://github.com/gtank/blake2-rfc"
-rev = "7a5b5fc99ae483a0043db7547fb79a6fa44b88a9"
+tiny-keccak = {version = "1.4.2", optional = true}
+blake2-rfc = {version = "0.2.18", optional = true}
 
 [features]
 default = ["multicore"]
 #default = ["multicore", "gm17", "sonic"]
 #default = ["wasm"]
 multicore = ["futures-cpupool", "num_cpus", "crossbeam"]
-sonic = ["tiny-keccak"]
+sonic = ["tiny-keccak", "blake2-rfc"]
 gm17 = []
 wasm = ["web-sys"]
diff --git a/src/sonic/cs/mod.rs b/src/sonic/cs/mod.rs
index 59e39f8..8d4ab0b 100644
--- a/src/sonic/cs/mod.rs
+++ b/src/sonic/cs/mod.rs
@@ -1,5 +1,3 @@
-extern crate pairing;
-
 use crate::pairing::ff::{Field};
 use crate::pairing::{Engine};
 
diff --git a/src/sonic/helped/mod.rs b/src/sonic/helped/mod.rs
index fe2b440..c1d136b 100644
--- a/src/sonic/helped/mod.rs
+++ b/src/sonic/helped/mod.rs
@@ -1,5 +1,3 @@
-extern crate pairing;
-
 use crate::pairing::ff::{Field};
 use crate::pairing::{Engine, CurveProjective};
 use std::marker::PhantomData;
diff --git a/src/sonic/mod.rs b/src/sonic/mod.rs
index 4c99ffa..54c2005 100644
--- a/src/sonic/mod.rs
+++ b/src/sonic/mod.rs
@@ -1,5 +1,3 @@
-extern crate pairing;
-
 pub use crate::{SynthesisError};
 
 pub mod sonic;
diff --git a/src/sonic/sonic/adaptor.rs b/src/sonic/sonic/adaptor.rs
index 70012ac..e57fb37 100644
--- a/src/sonic/sonic/adaptor.rs
+++ b/src/sonic/sonic/adaptor.rs
@@ -1,6 +1,3 @@
-extern crate pairing;
-extern crate rand;
-
 use crate::pairing::ff::{Field, PrimeField};
 use crate::pairing::{Engine, CurveProjective};
 
diff --git a/src/sonic/sonic/mod.rs b/src/sonic/sonic/mod.rs
index aa16edb..b3b4353 100644
--- a/src/sonic/sonic/mod.rs
+++ b/src/sonic/sonic/mod.rs
@@ -1,5 +1,3 @@
-extern crate pairing;
-
 mod adaptor;
 
 pub use self::adaptor::{Adaptor, AdaptorCircuit};
\ No newline at end of file
diff --git a/src/sonic/srs/mod.rs b/src/sonic/srs/mod.rs
index e93d24f..db33799 100644
--- a/src/sonic/srs/mod.rs
+++ b/src/sonic/srs/mod.rs
@@ -1,4 +1,2 @@
-extern crate pairing;
-
 mod srs;
 pub use self::srs::SRS;
\ No newline at end of file
diff --git a/src/sonic/tests/sonics.rs b/src/sonic/tests/sonics.rs
index a441dea..9b1f31b 100644
--- a/src/sonic/tests/sonics.rs
+++ b/src/sonic/tests/sonics.rs
@@ -1,7 +1,3 @@
-extern crate bellman;
-extern crate pairing;
-extern crate rand;
-
 // For randomness (during paramgen and proof generation)
 use rand::{thread_rng, Rng};
 
diff --git a/src/sonic/transcript/hasher.rs b/src/sonic/transcript/hasher.rs
index 7474d30..351a3a9 100644
--- a/src/sonic/transcript/hasher.rs
+++ b/src/sonic/transcript/hasher.rs
@@ -2,7 +2,7 @@ extern crate tiny_keccak;
 extern crate blake2_rfc;
 
 use self::tiny_keccak::Keccak;
-use self::blake2_rfc::blake2s::Blake2s;
+use self::blake2_rfc::blake2s::{Blake2s, blake2s};
 
 pub trait Hasher {
     fn new(personalization: &[u8]) -> Self;
@@ -17,7 +17,8 @@ pub struct BlakeHasher {
 
 impl Hasher for BlakeHasher {
     fn new(personalization: &[u8]) -> Self {
-        let h = Blake2s::with_params(32, &[], &[], personalization);
+        let mut h = Blake2s::new(32);
+        h.update(personalization);
 
         Self {
             h: h
@@ -31,7 +32,7 @@ impl Hasher for BlakeHasher {
     fn finalize(&mut self) -> Vec<u8> {
         use std::mem;
 
-        let new_h = Blake2s::with_params(32, &[], &[], &[]);
+        let new_h = Blake2s::new(32);
         let h = std::mem::replace(&mut self.h, new_h);
 
         let result = h.finalize();
diff --git a/src/sonic/transcript/mod.rs b/src/sonic/transcript/mod.rs
index 7e45f39..6f218ed 100644
--- a/src/sonic/transcript/mod.rs
+++ b/src/sonic/transcript/mod.rs
@@ -1,5 +1,3 @@
-extern crate pairing;
-
 use crate::pairing::ff::{Field, PrimeField, PrimeFieldRepr};
 use crate::pairing::{CurveAffine, CurveProjective, Engine};
 use std::io;
diff --git a/tests/mimc.rs b/tests/mimc.rs
index 933fb54..383d8a7 100644
--- a/tests/mimc.rs
+++ b/tests/mimc.rs
@@ -1,7 +1,3 @@
-extern crate bellman;
-extern crate pairing;
-extern crate rand;
-
 // For randomness (during paramgen and proof generation)
 use rand::{thread_rng, Rng};
 
@@ -9,32 +5,32 @@ use rand::{thread_rng, Rng};
 use std::time::{Duration, Instant};
 
 // Bring in some tools for using pairing-friendly curves
-use crate::pairing::{
+use bellman_ce::pairing::{
     Engine  
 };
 
-use crate::pairing::ff::{
+use bellman_ce::pairing::ff::{
     Field,
 };
 
 // We're going to use the BLS12-381 pairing-friendly elliptic curve.
-use crate::pairing::bls12_381::{
+use bellman_ce::pairing::bls12_381::{
     Bls12
 };
 
-use crate::pairing::bn256::{
+use bellman_ce::pairing::bn256::{
     Bn256
 };
 
 // We'll use these interfaces to construct our circuit.
-use bellman::{
+use bellman_ce::{
     Circuit,
     ConstraintSystem,
     SynthesisError
 };
 
 // We're going to use the Groth16 proving system.
-use bellman::groth16::{
+use bellman_ce::groth16::{
     Proof,
     generate_random_parameters,
     prepare_verifying_key,