diff --git a/poly-commit/Cargo.toml b/poly-commit/Cargo.toml
index 1412fb71..65bd8ead 100644
--- a/poly-commit/Cargo.toml
+++ b/poly-commit/Cargo.toml
@@ -17,7 +17,6 @@ ark-crypto-primitives = {version = "^0.4.0", default-features = false, features
 ark-std = { version = "^0.4.0", default-features = false }
 
 blake2 = { version = "0.10", default-features = false }
-blake3 = { version = "1.5.4", default-features = false }
 derivative = { version = "2", features = [ "use_core" ] }
 digest = "0.10"
 
diff --git a/poly-commit/src/constraints.rs b/poly-commit/src/constraints.rs
index 12962aec..997296dd 100644
--- a/poly-commit/src/constraints.rs
+++ b/poly-commit/src/constraints.rs
@@ -202,7 +202,10 @@ pub struct LabeledPointVar<TargetField: PrimeField, BaseField: PrimeField> {
 /// An allocated version of `QuerySet`.
 #[derive(Clone)]
 pub struct QuerySetVar<TargetField: PrimeField, BaseField: PrimeField>(
-    pub HashSet<(String, LabeledPointVar<TargetField, BaseField>), DefaultHasher>,
+    pub  HashSet<
+        (String, LabeledPointVar<TargetField, BaseField>),
+        BuildHasherDefault<DefaultHasher>,
+    >,
 );
 
 /// An allocated version of `Evaluations`.
diff --git a/poly-commit/src/hyrax/mod.rs b/poly-commit/src/hyrax/mod.rs
index 85a3a833..27545e99 100644
--- a/poly-commit/src/hyrax/mod.rs
+++ b/poly-commit/src/hyrax/mod.rs
@@ -11,6 +11,9 @@ use ark_poly::MultilinearExtension;
 use ark_serialize::serialize_to_vec;
 use ark_std::{marker::PhantomData, rand::RngCore, string::ToString, vec::Vec, UniformRand};
 
+use blake2::Blake2s256;
+use digest::Digest;
+
 #[cfg(feature = "parallel")]
 use rayon::prelude::*;
 
@@ -144,15 +147,16 @@ where
         // generators, since the point at infinity should theoretically occur)
         let points: Vec<_> = ark_std::cfg_into_iter!(0u64..dim + 1)
             .map(|i| {
-                let hash = blake3::hash([PROTOCOL_NAME, &i.to_le_bytes()].concat().as_slice());
-                let mut p = G::from_random_bytes(hash.as_bytes());
+                let hash =
+                    Blake2s256::digest([PROTOCOL_NAME, &i.to_le_bytes()].concat().as_slice());
+                let mut p = G::from_random_bytes(&hash);
                 let mut j = 0u64;
                 while p.is_none() {
                     let mut bytes = PROTOCOL_NAME.to_vec();
                     bytes.extend(i.to_le_bytes());
                     bytes.extend(j.to_le_bytes());
-                    let hash = blake3::hash(bytes.as_slice());
-                    p = G::from_random_bytes(hash.as_bytes());
+                    let hash = Blake2s256::digest(bytes.as_slice());
+                    p = G::from_random_bytes(&hash);
                     j += 1;
                 }
                 let point = p.unwrap();