diff --git a/Cargo.toml b/Cargo.toml
index 519ac8d..7f23989 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,24 +13,25 @@ categories = ["data-structures", "cryptography::cryptocurrencies", ]
 [dependencies]
 derivative = "2.2.0"
 ethereum_hashing = "0.7.0"
-ethereum_ssz = "0.5.0"
-ethereum_ssz_derive = "0.5.0"
-itertools = "0.10.3"
+ethereum_ssz = "0.6.0"
+ethereum_ssz_derive = "0.6.0"
+itertools = "0.13.0"
 parking_lot = "0.12.1"
 rayon = "1.5.1"
 serde = { version = "1.0.0", features = ["derive"] }
-tree_hash = "0.6.0"
+tree_hash = "0.7.0"
 triomphe = "0.1.5"
 typenum = "1.14.0"
 vec_map = "0.8.2"
 smallvec = "1.8.0"
 arbitrary = { version = "1.2.3", features = ["derive"] }
-ethereum-types = { version = "0.14.1", features = ["arbitrary"] }
+alloy-primitives = { version = "0.7.7", features = ["arbitrary"] }
+
 
 [dev-dependencies]
-ssz_types = "0.6.0"
+ssz_types = "0.7.0"
 proptest = "1.0.0"
-tree_hash_derive = "0.6.0"
+tree_hash_derive = "0.7.0"
 criterion = "0.5"
 
 [features]
diff --git a/src/leaf.rs b/src/leaf.rs
index bd64bfe..285cadd 100644
--- a/src/leaf.rs
+++ b/src/leaf.rs
@@ -31,7 +31,7 @@ where
 
 impl<T> Leaf<T> {
     pub fn new(value: T) -> Self {
-        Self::with_hash(value, Hash256::zero())
+        Self::with_hash(value, Hash256::ZERO)
     }
 
     pub fn with_hash(value: T, hash: Hash256) -> Self {
diff --git a/src/packed_leaf.rs b/src/packed_leaf.rs
index b0f3770..e867bff 100644
--- a/src/packed_leaf.rs
+++ b/src/packed_leaf.rs
@@ -36,7 +36,7 @@ impl<T: TreeHash + Clone> PackedLeaf<T> {
             return hash;
         }
 
-        let hash_bytes = hash.as_bytes_mut();
+        let hash_bytes = hash.as_mut_slice();
 
         let value_len = BYTES_PER_CHUNK / T::tree_hash_packing_factor();
         for (i, value) in self.values.iter().enumerate() {
@@ -50,7 +50,7 @@ impl<T: TreeHash + Clone> PackedLeaf<T> {
 
     pub fn empty() -> Self {
         PackedLeaf {
-            hash: RwLock::new(Hash256::zero()),
+            hash: RwLock::new(Hash256::ZERO),
             values: Vec::with_capacity(T::tree_hash_packing_factor()),
         }
     }
@@ -60,7 +60,7 @@ impl<T: TreeHash + Clone> PackedLeaf<T> {
         values.push(value);
 
         PackedLeaf {
-            hash: RwLock::new(Hash256::zero()),
+            hash: RwLock::new(Hash256::ZERO),
             values,
         }
     }
@@ -68,14 +68,14 @@ impl<T: TreeHash + Clone> PackedLeaf<T> {
     pub fn repeat(value: T, n: usize) -> Self {
         assert!(n <= T::tree_hash_packing_factor());
         PackedLeaf {
-            hash: RwLock::new(Hash256::zero()),
+            hash: RwLock::new(Hash256::ZERO),
             values: vec![value; n],
         }
     }
 
     pub fn insert_at_index(&self, index: usize, value: T) -> Result<Self, Error> {
         let mut updated = PackedLeaf {
-            hash: RwLock::new(Hash256::zero()),
+            hash: RwLock::new(Hash256::ZERO),
             values: self.values.clone(),
         };
         let sub_index = index % T::tree_hash_packing_factor();
@@ -105,7 +105,7 @@ impl<T: TreeHash + Clone> PackedLeaf<T> {
 
     pub fn insert_mut(&mut self, sub_index: usize, value: T) -> Result<(), Error> {
         // Ensure hash is 0.
-        *self.hash.get_mut() = Hash256::zero();
+        *self.hash.get_mut() = Hash256::ZERO;
 
         if sub_index == self.values.len() {
             self.values.push(value);
diff --git a/src/repeat.rs b/src/repeat.rs
index e6a70f3..5b8033d 100644
--- a/src/repeat.rs
+++ b/src/repeat.rs
@@ -45,31 +45,31 @@ where
         let new_layer = match &layer[..] {
             [(repeat_leaf, 1)] => {
                 smallvec![(
-                    Tree::node(repeat_leaf.clone(), Tree::zero(depth), Hash256::zero()),
+                    Tree::node(repeat_leaf.clone(), Tree::zero(depth), Hash256::ZERO),
                     1,
                 )]
             }
             [(repeat_leaf, repeat_count)] if repeat_count % 2 == 0 => {
                 smallvec![(
-                    Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::zero()),
+                    Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::ZERO),
                     repeat_count / 2,
                 )]
             }
             [(repeat_leaf, repeat_count)] => {
                 smallvec![
                     (
-                        Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::zero()),
+                        Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::ZERO),
                         repeat_count / 2,
                     ),
                     (
-                        Tree::node(repeat_leaf.clone(), Tree::zero(depth), Hash256::zero()),
+                        Tree::node(repeat_leaf.clone(), Tree::zero(depth), Hash256::ZERO),
                         1,
                     ),
                 ]
             }
             [(repeat_leaf, 1), (lonely_leaf, 1)] => {
                 smallvec![(
-                    Tree::node(repeat_leaf.clone(), lonely_leaf.clone(), Hash256::zero()),
+                    Tree::node(repeat_leaf.clone(), lonely_leaf.clone(), Hash256::ZERO),
                     1,
                 )]
             }
@@ -77,22 +77,22 @@ where
                 if repeat_count % 2 == 0 {
                     smallvec![
                         (
-                            Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::zero()),
+                            Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::ZERO),
                             repeat_count / 2,
                         ),
                         (
-                            Tree::node(lonely_leaf.clone(), Tree::zero(depth), Hash256::zero()),
+                            Tree::node(lonely_leaf.clone(), Tree::zero(depth), Hash256::ZERO),
                             1,
                         ),
                     ]
                 } else {
                     smallvec![
                         (
-                            Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::zero()),
+                            Tree::node(repeat_leaf.clone(), repeat_leaf.clone(), Hash256::ZERO),
                             repeat_count / 2,
                         ),
                         (
-                            Tree::node(repeat_leaf.clone(), lonely_leaf.clone(), Hash256::zero()),
+                            Tree::node(repeat_leaf.clone(), lonely_leaf.clone(), Hash256::ZERO),
                             1,
                         ),
                     ]
diff --git a/src/tests/builder.rs b/src/tests/builder.rs
index f516b6e..ca43183 100644
--- a/src/tests/builder.rs
+++ b/src/tests/builder.rs
@@ -7,7 +7,7 @@ fn build_partial_hash256_list() {
     type N = U16;
     let n = N::to_usize();
     let vec = (0..n as u64)
-        .map(Hash256::from_low_u64_be)
+        .map(|n| Hash256::right_padding_from(&n.to_le_bytes()))
         .collect::<Vec<_>>();
 
     for k in 0..n {
diff --git a/src/tests/iterator.rs b/src/tests/iterator.rs
index 3afaaf2..5b5cc1c 100644
--- a/src/tests/iterator.rs
+++ b/src/tests/iterator.rs
@@ -6,7 +6,9 @@ use typenum::{Unsigned, U64};
 fn hash256_vec_iter() {
     type N = U64;
     let n = N::to_u64();
-    let vec = (0..n).map(Hash256::from_low_u64_be).collect::<Vec<_>>();
+    let vec = (0..n)
+        .map(|n| Hash256::right_padding_from(&n.to_le_bytes()))
+        .collect::<Vec<_>>();
     let vector = Vector::<Hash256, N>::new(vec.clone()).unwrap();
 
     assert_eq!(vector.iter().cloned().collect::<Vec<_>>(), vec);
@@ -16,7 +18,9 @@ fn hash256_vec_iter() {
 fn hash256_list_iter() {
     type N = U64;
     let n = N::to_u64();
-    let vec = (0..n).map(Hash256::from_low_u64_be).collect::<Vec<_>>();
+    let vec = (0..n)
+        .map(|n| Hash256::right_padding_from(&n.to_le_bytes()))
+        .collect::<Vec<_>>();
     let list = List::<Hash256, N>::new(vec.clone()).unwrap();
 
     assert_eq!(list.iter().cloned().collect::<Vec<_>>(), vec);
@@ -27,7 +31,7 @@ fn hash256_list_iter_from() {
     type N = U64;
     let n = N::to_usize();
     let vec = (0..n as u64)
-        .map(Hash256::from_low_u64_be)
+        .map(|n| Hash256::right_padding_from(&n.to_le_bytes()))
         .collect::<Vec<_>>();
     let list = List::<Hash256, N>::new(vec.clone()).unwrap();
 
@@ -52,7 +56,7 @@ fn hash256_vector_iter_from() {
     type N = U64;
     let n = N::to_usize();
     let vec = (0..n as u64)
-        .map(Hash256::from_low_u64_be)
+        .map(|n| Hash256::right_padding_from(&n.to_le_bytes()))
         .collect::<Vec<_>>();
     let vect = Vector::<Hash256, N>::new(vec.clone()).unwrap();
 
diff --git a/src/tree.rs b/src/tree.rs
index 63ed3f9..ac306d2 100644
--- a/src/tree.rs
+++ b/src/tree.rs
@@ -67,7 +67,7 @@ impl<T: Value> Tree<T> {
 
     pub fn node_unboxed(left: Arc<Self>, right: Arc<Self>) -> Self {
         Self::Node {
-            hash: RwLock::new(Hash256::zero()),
+            hash: RwLock::new(Hash256::ZERO),
             left,
             right,
         }
@@ -124,14 +124,14 @@ impl<T: Value> Tree<T> {
                     Ok(Self::node(
                         left.with_updated_leaf(index, new_value, new_depth)?,
                         right.clone(),
-                        Hash256::zero(),
+                        Hash256::ZERO,
                     ))
                 } else {
                     // Index lies on the right, recurse right
                     Ok(Self::node(
                         left.clone(),
                         right.with_updated_leaf(index, new_value, new_depth)?,
-                        Hash256::zero(),
+                        Hash256::ZERO,
                     ))
                 }
             }
@@ -146,7 +146,7 @@ impl<T: Value> Tree<T> {
                     // Split zero node into a node with left and right, and recurse into
                     // the appropriate subtree
                     let new_zero = Self::zero(depth - 1);
-                    Self::node(new_zero.clone(), new_zero, Hash256::zero())
+                    Self::node(new_zero.clone(), new_zero, Hash256::ZERO)
                         .with_updated_leaf(index, new_value, depth)
                 }
             }
@@ -442,7 +442,7 @@ impl<T: Value + Send + Sync> Tree<T> {
                     let (left_hash, right_hash) =
                         rayon::join(|| left.tree_hash(), || right.tree_hash());
                     let tree_hash =
-                        Hash256::from(hash32_concat(left_hash.as_bytes(), right_hash.as_bytes()));
+                        Hash256::from(hash32_concat(left_hash.as_slice(), right_hash.as_slice()));
                     *hash.write() = tree_hash;
                     tree_hash
                 }