diff --git a/docs/README.md b/docs/README.md
index 18bc68e..03f1440 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -133,6 +133,10 @@ npm test
 - Q: Is there an NFT whitelist example in Solidity?
   - A: Check out the example repo [merkletreejs-nft-whitelist](https://github.com/miguelmota/merkletreejs-nft-whitelist) on how to generate merkle root of whitelisted accounts and merkle proofs with this library and verify them in Solidity.
 
+- Q: What other types of merkle trees are supported?
+
+  - Besides standard `MerkleTree`, there's also `MerkleMountainRange`, `MerkleSumTree`, and `IncrementalMerkleTree` implemenation classes available.
+
 - Q: Is there a CLI version of this library?
 
   - Yes, see [merkletreejs-cli](https://github.com/miguelmota/merkletreejs-cli).
diff --git a/docs/classes/_src_base_.base.md b/docs/classes/_src_base_.base.md
index 6d5e862..36236bc 100644
--- a/docs/classes/_src_base_.base.md
+++ b/docs/classes/_src_base_.base.md
@@ -10,6 +10,8 @@
 
   ↳ [MerkleMountainRange](_src_merklemountainrange_.merklemountainrange.md)
 
+  ↳ [MerkleSumTree](_src_merklesumtree_.merklesumtree.md)
+
   ↳ [MerkleTree](_src_merkletree_.merkletree.md)
 
 ## Index
diff --git a/docs/classes/_src_merklesumtree_.bucket.md b/docs/classes/_src_merklesumtree_.bucket.md
new file mode 100644
index 0000000..fa83d19
--- /dev/null
+++ b/docs/classes/_src_merklesumtree_.bucket.md
@@ -0,0 +1,66 @@
+[merkletreejs](../README.md) › [Globals](../globals.md) › ["src/MerkleSumTree"](../modules/_src_merklesumtree_.md) › [Bucket](_src_merklesumtree_.bucket.md)
+
+# Class: Bucket
+
+## Hierarchy
+
+* **Bucket**
+
+## Index
+
+### Constructors
+
+* [constructor](_src_merklesumtree_.bucket.md#constructor)
+
+### Properties
+
+* [hashed](_src_merklesumtree_.bucket.md#hashed)
+* [left](_src_merklesumtree_.bucket.md#left)
+* [parent](_src_merklesumtree_.bucket.md#parent)
+* [right](_src_merklesumtree_.bucket.md#right)
+* [size](_src_merklesumtree_.bucket.md#size)
+
+## Constructors
+
+###  constructor
+
+\+ **new Bucket**(`size`: BigInt | number, `hashed`: Buffer): *[Bucket](_src_merklesumtree_.bucket.md)*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`size` | BigInt | number |
+`hashed` | Buffer |
+
+**Returns:** *[Bucket](_src_merklesumtree_.bucket.md)*
+
+## Properties
+
+###  hashed
+
+• **hashed**: *Buffer*
+
+___
+
+###  left
+
+• **left**: *[Bucket](_src_merklesumtree_.bucket.md) | null*
+
+___
+
+###  parent
+
+• **parent**: *[Bucket](_src_merklesumtree_.bucket.md) | null*
+
+___
+
+###  right
+
+• **right**: *[Bucket](_src_merklesumtree_.bucket.md) | null*
+
+___
+
+###  size
+
+• **size**: *BigInt*
diff --git a/docs/classes/_src_merklesumtree_.leaf.md b/docs/classes/_src_merklesumtree_.leaf.md
new file mode 100644
index 0000000..4c1b917
--- /dev/null
+++ b/docs/classes/_src_merklesumtree_.leaf.md
@@ -0,0 +1,65 @@
+[merkletreejs](../README.md) › [Globals](../globals.md) › ["src/MerkleSumTree"](../modules/_src_merklesumtree_.md) › [Leaf](_src_merklesumtree_.leaf.md)
+
+# Class: Leaf
+
+## Hierarchy
+
+* **Leaf**
+
+## Index
+
+### Constructors
+
+* [constructor](_src_merklesumtree_.leaf.md#constructor)
+
+### Properties
+
+* [data](_src_merklesumtree_.leaf.md#data)
+* [hashFn](_src_merklesumtree_.leaf.md#hashfn)
+* [rng](_src_merklesumtree_.leaf.md#rng)
+
+### Methods
+
+* [getBucket](_src_merklesumtree_.leaf.md#getbucket)
+
+## Constructors
+
+###  constructor
+
+\+ **new Leaf**(`hashFn`: [THashFn](../modules/_src_merklesumtree_.md#thashfn), `rng`: (number | BigInt)[], `data`: Buffer | null): *[Leaf](_src_merklesumtree_.leaf.md)*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`hashFn` | [THashFn](../modules/_src_merklesumtree_.md#thashfn) |
+`rng` | (number | BigInt)[] |
+`data` | Buffer | null |
+
+**Returns:** *[Leaf](_src_merklesumtree_.leaf.md)*
+
+## Properties
+
+###  data
+
+• **data**: *Buffer | null*
+
+___
+
+###  hashFn
+
+• **hashFn**: *[THashFn](../modules/_src_merklesumtree_.md#thashfn)*
+
+___
+
+###  rng
+
+• **rng**: *BigInt[]*
+
+## Methods
+
+###  getBucket
+
+▸ **getBucket**(): *[Bucket](_src_merklesumtree_.bucket.md)‹›*
+
+**Returns:** *[Bucket](_src_merklesumtree_.bucket.md)‹›*
diff --git a/docs/classes/_src_merklesumtree_.merklesumtree.md b/docs/classes/_src_merklesumtree_.merklesumtree.md
new file mode 100644
index 0000000..5354952
--- /dev/null
+++ b/docs/classes/_src_merklesumtree_.merklesumtree.md
@@ -0,0 +1,674 @@
+[merkletreejs](../README.md) › [Globals](../globals.md) › ["src/MerkleSumTree"](../modules/_src_merklesumtree_.md) › [MerkleSumTree](_src_merklesumtree_.merklesumtree.md)
+
+# Class: MerkleSumTree
+
+## Hierarchy
+
+* [Base](_src_base_.base.md)
+
+  ↳ **MerkleSumTree**
+
+## Index
+
+### Constructors
+
+* [constructor](_src_merklesumtree_.merklesumtree.md#constructor)
+
+### Properties
+
+* [buckets](_src_merklesumtree_.merklesumtree.md#buckets)
+* [hashFn](_src_merklesumtree_.merklesumtree.md#hashfn)
+* [leaves](_src_merklesumtree_.merklesumtree.md#leaves)
+* [root](_src_merklesumtree_.merklesumtree.md#root)
+
+### Methods
+
+* [bigNumberify](_src_merklesumtree_.merklesumtree.md#bignumberify)
+* [binarySearch](_src_merklesumtree_.merklesumtree.md#binarysearch)
+* [bufferIndexOf](_src_merklesumtree_.merklesumtree.md#protected-bufferindexof)
+* [bufferToHex](_src_merklesumtree_.merklesumtree.md#buffertohex)
+* [bufferify](_src_merklesumtree_.merklesumtree.md#bufferify)
+* [bufferifyFn](_src_merklesumtree_.merklesumtree.md#bufferifyfn)
+* [getProof](_src_merklesumtree_.merklesumtree.md#getproof)
+* [isHexString](_src_merklesumtree_.merklesumtree.md#protected-ishexstring)
+* [linearSearch](_src_merklesumtree_.merklesumtree.md#linearsearch)
+* [log2](_src_merklesumtree_.merklesumtree.md#protected-log2)
+* [print](_src_merklesumtree_.merklesumtree.md#print)
+* [sizeToBuffer](_src_merklesumtree_.merklesumtree.md#sizetobuffer)
+* [sum](_src_merklesumtree_.merklesumtree.md#sum)
+* [verifyProof](_src_merklesumtree_.merklesumtree.md#verifyproof)
+* [zip](_src_merklesumtree_.merklesumtree.md#protected-zip)
+* [bigNumberify](_src_merklesumtree_.merklesumtree.md#static-bignumberify)
+* [binarySearch](_src_merklesumtree_.merklesumtree.md#static-binarysearch)
+* [bufferToHex](_src_merklesumtree_.merklesumtree.md#static-buffertohex)
+* [bufferify](_src_merklesumtree_.merklesumtree.md#static-bufferify)
+* [checkConsecutive](_src_merklesumtree_.merklesumtree.md#static-checkconsecutive)
+* [hexZeroPad](_src_merklesumtree_.merklesumtree.md#static-hexzeropad)
+* [isHexString](_src_merklesumtree_.merklesumtree.md#static-ishexstring)
+* [linearSearch](_src_merklesumtree_.merklesumtree.md#static-linearsearch)
+* [print](_src_merklesumtree_.merklesumtree.md#static-print)
+
+## Constructors
+
+###  constructor
+
+\+ **new MerkleSumTree**(`leaves`: [Leaf](_src_merklesumtree_.leaf.md)[], `hashFn`: [THashFn](../modules/_src_merklesumtree_.md#thashfn)): *[MerkleSumTree](_src_merklesumtree_.merklesumtree.md)*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`leaves` | [Leaf](_src_merklesumtree_.leaf.md)[] |
+`hashFn` | [THashFn](../modules/_src_merklesumtree_.md#thashfn) |
+
+**Returns:** *[MerkleSumTree](_src_merklesumtree_.merklesumtree.md)*
+
+## Properties
+
+###  buckets
+
+• **buckets**: *[Bucket](_src_merklesumtree_.bucket.md)[]*
+
+___
+
+###  hashFn
+
+• **hashFn**: *[THashFn](../modules/_src_merklesumtree_.md#thashfn)*
+
+___
+
+###  leaves
+
+• **leaves**: *[Leaf](_src_merklesumtree_.leaf.md)[]*
+
+___
+
+###  root
+
+• **root**: *[Bucket](_src_merklesumtree_.bucket.md)*
+
+## Methods
+
+###  bigNumberify
+
+▸ **bigNumberify**(`value`: any): *BigInt*
+
+*Inherited from [Base](_src_base_.base.md).[bigNumberify](_src_base_.base.md#bignumberify)*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`value` | any |
+
+**Returns:** *BigInt*
+
+___
+
+###  binarySearch
+
+▸ **binarySearch**(`array`: Buffer[], `element`: Buffer, `compareFunction`: function): *number*
+
+*Inherited from [Base](_src_base_.base.md).[binarySearch](_src_base_.base.md#static-binarysearch)*
+
+binarySearch
+
+**`desc`** Returns the first index of which given item is found in array using binary search.
+
+**`example`** 
+```js
+const index = tree.binarySearch(array, element, Buffer.compare)
+```
+
+**Parameters:**
+
+▪ **array**: *Buffer[]*
+
+Array of items.
+
+▪ **element**: *Buffer*
+
+Item to find.
+
+▪ **compareFunction**: *function*
+
+▸ (`a`: unknown, `b`: unknown): *number*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`a` | unknown |
+`b` | unknown |
+
+**Returns:** *number*
+
+- Index number
+
+___
+
+### `Protected` bufferIndexOf
+
+▸ **bufferIndexOf**(`array`: Buffer[], `element`: Buffer, `isSorted`: boolean): *number*
+
+*Inherited from [Base](_src_base_.base.md).[bufferIndexOf](_src_base_.base.md#protected-bufferindexof)*
+
+bufferIndexOf
+
+**`desc`** Returns the first index of which given buffer is found in array.
+
+**`example`** 
+```js
+const index = tree.bufferIndexOf(haystack, needle)
+```
+
+**Parameters:**
+
+Name | Type | Default |
+------ | ------ | ------ |
+`array` | Buffer[] | - |
+`element` | Buffer | - |
+`isSorted` | boolean | false |
+
+**Returns:** *number*
+
+- Index number
+
+___
+
+###  bufferToHex
+
+▸ **bufferToHex**(`value`: Buffer, `withPrefix`: boolean): *string*
+
+*Inherited from [Base](_src_base_.base.md).[bufferToHex](_src_base_.base.md#buffertohex)*
+
+bufferToHex
+
+**`desc`** Returns a hex string with 0x prefix for given buffer.
+
+**`example`** 
+```js
+const hexStr = tree.bufferToHex(Buffer.from('A'))
+```
+
+**Parameters:**
+
+Name | Type | Default |
+------ | ------ | ------ |
+`value` | Buffer | - |
+`withPrefix` | boolean | true |
+
+**Returns:** *string*
+
+___
+
+###  bufferify
+
+▸ **bufferify**(`value`: any): *Buffer*
+
+*Inherited from [Base](_src_base_.base.md).[bufferify](_src_base_.base.md#static-bufferify)*
+
+bufferify
+
+**`desc`** Returns a buffer type for the given value.
+
+**`example`** 
+```js
+const buf = tree.bufferify('0x1234')
+```
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`value` | any |
+
+**Returns:** *Buffer*
+
+___
+
+###  bufferifyFn
+
+▸ **bufferifyFn**(`f`: any): *any*
+
+*Inherited from [Base](_src_base_.base.md).[bufferifyFn](_src_base_.base.md#bufferifyfn)*
+
+bufferifyFn
+
+**`desc`** Returns a function that will bufferify the return value.
+
+**`example`** 
+```js
+const fn = tree.bufferifyFn((value) => sha256(value))
+```
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`f` | any |
+
+**Returns:** *any*
+
+___
+
+###  getProof
+
+▸ **getProof**(`index`: number | BigInt): *any[]*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`index` | number | BigInt |
+
+**Returns:** *any[]*
+
+___
+
+### `Protected` isHexString
+
+▸ **isHexString**(`value`: string): *boolean*
+
+*Inherited from [Base](_src_base_.base.md).[isHexString](_src_base_.base.md#static-ishexstring)*
+
+isHexString
+
+**`desc`** Returns true if value is a hex string.
+
+**`example`** 
+```js
+console.log(MerkleTree.isHexString('0x1234'))
+```
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`value` | string |
+
+**Returns:** *boolean*
+
+___
+
+###  linearSearch
+
+▸ **linearSearch**(`array`: Buffer[], `element`: Buffer, `eqChecker`: function): *number*
+
+*Inherited from [Base](_src_base_.base.md).[linearSearch](_src_base_.base.md#static-linearsearch)*
+
+linearSearch
+
+**`desc`** Returns the first index of which given item is found in array using linear search.
+
+**`example`** 
+```js
+const index = tree.linearSearch(array, element, (a, b) => a === b)
+```
+
+**Parameters:**
+
+▪ **array**: *Buffer[]*
+
+Array of items.
+
+▪ **element**: *Buffer*
+
+Item to find.
+
+▪ **eqChecker**: *function*
+
+▸ (`a`: unknown, `b`: unknown): *boolean*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`a` | unknown |
+`b` | unknown |
+
+**Returns:** *number*
+
+- Index number
+
+___
+
+### `Protected` log2
+
+▸ **log2**(`n`: number): *number*
+
+*Inherited from [Base](_src_base_.base.md).[log2](_src_base_.base.md#protected-log2)*
+
+log2
+
+**`desc`** Returns the log2 of number.
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`n` | number |
+
+**Returns:** *number*
+
+___
+
+###  print
+
+▸ **print**(): *void*
+
+*Inherited from [Base](_src_base_.base.md).[print](_src_base_.base.md#print)*
+
+print
+
+**`desc`** Prints out a visual representation of the merkle tree.
+
+**`example`** 
+```js
+tree.print()
+```
+
+**Returns:** *void*
+
+___
+
+###  sizeToBuffer
+
+▸ **sizeToBuffer**(`size`: BigInt): *Buffer‹›*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`size` | BigInt |
+
+**Returns:** *Buffer‹›*
+
+___
+
+###  sum
+
+▸ **sum**(`arr`: BigInt[]): *bigint*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`arr` | BigInt[] |
+
+**Returns:** *bigint*
+
+___
+
+###  verifyProof
+
+▸ **verifyProof**(`root`: [Bucket](_src_merklesumtree_.bucket.md), `leaf`: [Leaf](_src_merklesumtree_.leaf.md), `proof`: [ProofStep](_src_merklesumtree_.proofstep.md)[]): *boolean*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`root` | [Bucket](_src_merklesumtree_.bucket.md) |
+`leaf` | [Leaf](_src_merklesumtree_.leaf.md) |
+`proof` | [ProofStep](_src_merklesumtree_.proofstep.md)[] |
+
+**Returns:** *boolean*
+
+___
+
+### `Protected` zip
+
+▸ **zip**(`a`: any[], `b`: any[]): *any[][]*
+
+*Inherited from [Base](_src_base_.base.md).[zip](_src_base_.base.md#protected-zip)*
+
+zip
+
+**`desc`** Returns true if value is a hex string.
+
+**`example`** 
+```js
+const zipped = tree.zip(['a', 'b'],['A', 'B'])
+console.log(zipped) // [ [ 'a', 'A' ], [ 'b', 'B' ] ]
+```
+
+**Parameters:**
+
+Name | Type | Description |
+------ | ------ | ------ |
+`a` | any[] | first array |
+`b` | any[] | second array |
+
+**Returns:** *any[][]*
+
+___
+
+### `Static` bigNumberify
+
+▸ **bigNumberify**(`value`: any): *BigInt*
+
+*Inherited from [Base](_src_base_.base.md).[bigNumberify](_src_base_.base.md#bignumberify)*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`value` | any |
+
+**Returns:** *BigInt*
+
+___
+
+### `Static` binarySearch
+
+▸ **binarySearch**(`array`: Buffer[], `element`: Buffer, `compareFunction`: function): *number*
+
+*Inherited from [Base](_src_base_.base.md).[binarySearch](_src_base_.base.md#static-binarysearch)*
+
+binarySearch
+
+**`desc`** Returns the first index of which given item is found in array using binary search.
+
+**`example`** 
+```js
+const index = MerkleTree.binarySearch(array, element, Buffer.compare)
+```
+
+**Parameters:**
+
+▪ **array**: *Buffer[]*
+
+Array of items.
+
+▪ **element**: *Buffer*
+
+Item to find.
+
+▪ **compareFunction**: *function*
+
+▸ (`a`: unknown, `b`: unknown): *number*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`a` | unknown |
+`b` | unknown |
+
+**Returns:** *number*
+
+- Index number
+
+___
+
+### `Static` bufferToHex
+
+▸ **bufferToHex**(`value`: Buffer, `withPrefix`: boolean): *string*
+
+*Inherited from [Base](_src_base_.base.md).[bufferToHex](_src_base_.base.md#buffertohex)*
+
+bufferToHex
+
+**`desc`** Returns a hex string with 0x prefix for given buffer.
+
+**`example`** 
+```js
+const hexStr = MerkleTree.bufferToHex(Buffer.from('A'))
+```
+
+**Parameters:**
+
+Name | Type | Default |
+------ | ------ | ------ |
+`value` | Buffer | - |
+`withPrefix` | boolean | true |
+
+**Returns:** *string*
+
+___
+
+### `Static` bufferify
+
+▸ **bufferify**(`value`: any): *Buffer*
+
+*Inherited from [Base](_src_base_.base.md).[bufferify](_src_base_.base.md#static-bufferify)*
+
+bufferify
+
+**`desc`** Returns a buffer type for the given value.
+
+**`example`** 
+```js
+const buf = MerkleTree.bufferify('0x1234')
+```
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`value` | any |
+
+**Returns:** *Buffer*
+
+___
+
+### `Static` checkConsecutive
+
+▸ **checkConsecutive**(`leaves`: [Leaf](_src_merklesumtree_.leaf.md)[]): *void*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`leaves` | [Leaf](_src_merklesumtree_.leaf.md)[] |
+
+**Returns:** *void*
+
+___
+
+### `Static` hexZeroPad
+
+▸ **hexZeroPad**(`hexStr`: string, `length`: number): *string*
+
+*Inherited from [Base](_src_base_.base.md).[hexZeroPad](_src_base_.base.md#static-hexzeropad)*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`hexStr` | string |
+`length` | number |
+
+**Returns:** *string*
+
+___
+
+### `Static` isHexString
+
+▸ **isHexString**(`v`: string): *boolean*
+
+*Inherited from [Base](_src_base_.base.md).[isHexString](_src_base_.base.md#static-ishexstring)*
+
+isHexString
+
+**`desc`** Returns true if value is a hex string.
+
+**`example`** 
+```js
+console.log(MerkleTree.isHexString('0x1234'))
+```
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`v` | string |
+
+**Returns:** *boolean*
+
+___
+
+### `Static` linearSearch
+
+▸ **linearSearch**(`array`: Buffer[], `element`: Buffer, `eqChecker`: function): *number*
+
+*Inherited from [Base](_src_base_.base.md).[linearSearch](_src_base_.base.md#static-linearsearch)*
+
+linearSearch
+
+**`desc`** Returns the first index of which given item is found in array using linear search.
+
+**`example`** 
+```js
+const index = MerkleTree.linearSearch(array, element, (a, b) => a === b)
+```
+
+**Parameters:**
+
+▪ **array**: *Buffer[]*
+
+Array of items.
+
+▪ **element**: *Buffer*
+
+Item to find.
+
+▪ **eqChecker**: *function*
+
+▸ (`a`: unknown, `b`: unknown): *boolean*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`a` | unknown |
+`b` | unknown |
+
+**Returns:** *number*
+
+- Index number
+
+___
+
+### `Static` print
+
+▸ **print**(`tree`: any): *void*
+
+*Inherited from [Base](_src_base_.base.md).[print](_src_base_.base.md#print)*
+
+print
+
+**`desc`** Prints out a visual representation of the given merkle tree.
+
+**`example`** 
+```js
+MerkleTree.print(tree)
+```
+
+**Parameters:**
+
+Name | Type | Description |
+------ | ------ | ------ |
+`tree` | any | Merkle tree instance. |
+
+**Returns:** *void*
diff --git a/docs/classes/_src_merklesumtree_.proofstep.md b/docs/classes/_src_merklesumtree_.proofstep.md
new file mode 100644
index 0000000..193b6c5
--- /dev/null
+++ b/docs/classes/_src_merklesumtree_.proofstep.md
@@ -0,0 +1,45 @@
+[merkletreejs](../README.md) › [Globals](../globals.md) › ["src/MerkleSumTree"](../modules/_src_merklesumtree_.md) › [ProofStep](_src_merklesumtree_.proofstep.md)
+
+# Class: ProofStep
+
+## Hierarchy
+
+* **ProofStep**
+
+## Index
+
+### Constructors
+
+* [constructor](_src_merklesumtree_.proofstep.md#constructor)
+
+### Properties
+
+* [bucket](_src_merklesumtree_.proofstep.md#bucket)
+* [right](_src_merklesumtree_.proofstep.md#right)
+
+## Constructors
+
+###  constructor
+
+\+ **new ProofStep**(`bucket`: [Bucket](_src_merklesumtree_.bucket.md), `right`: boolean): *[ProofStep](_src_merklesumtree_.proofstep.md)*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`bucket` | [Bucket](_src_merklesumtree_.bucket.md) |
+`right` | boolean |
+
+**Returns:** *[ProofStep](_src_merklesumtree_.proofstep.md)*
+
+## Properties
+
+###  bucket
+
+• **bucket**: *[Bucket](_src_merklesumtree_.bucket.md)*
+
+___
+
+###  right
+
+• **right**: *boolean*
diff --git a/docs/globals.md b/docs/globals.md
index 63219fe..c3ebe7d 100644
--- a/docs/globals.md
+++ b/docs/globals.md
@@ -9,5 +9,6 @@
 * ["src/Base"](modules/_src_base_.md)
 * ["src/IncrementalMerkleTree"](modules/_src_incrementalmerkletree_.md)
 * ["src/MerkleMountainRange"](modules/_src_merklemountainrange_.md)
+* ["src/MerkleSumTree"](modules/_src_merklesumtree_.md)
 * ["src/MerkleTree"](modules/_src_merkletree_.md)
 * ["src/index"](modules/_src_index_.md)
diff --git a/docs/modules/_src_index_.md b/docs/modules/_src_index_.md
index ad91663..92e05b9 100644
--- a/docs/modules/_src_index_.md
+++ b/docs/modules/_src_index_.md
@@ -8,6 +8,7 @@
 
 * [IncrementalMerkleTree](_src_index_.md#incrementalmerkletree)
 * [MerkleMountainRange](_src_index_.md#merklemountainrange)
+* [MerkleSumTree](_src_index_.md#merklesumtree)
 
 ## References
 
@@ -20,3 +21,9 @@ ___
 ###  MerkleMountainRange
 
 • **MerkleMountainRange**:
+
+___
+
+###  MerkleSumTree
+
+• **MerkleSumTree**:
diff --git a/docs/modules/_src_merklesumtree_.md b/docs/modules/_src_merklesumtree_.md
new file mode 100644
index 0000000..9755f2c
--- /dev/null
+++ b/docs/modules/_src_merklesumtree_.md
@@ -0,0 +1,39 @@
+[merkletreejs](../README.md) › [Globals](../globals.md) › ["src/MerkleSumTree"](_src_merklesumtree_.md)
+
+# Module: "src/MerkleSumTree"
+
+## Index
+
+### Classes
+
+* [Bucket](../classes/_src_merklesumtree_.bucket.md)
+* [Leaf](../classes/_src_merklesumtree_.leaf.md)
+* [MerkleSumTree](../classes/_src_merklesumtree_.merklesumtree.md)
+* [ProofStep](../classes/_src_merklesumtree_.proofstep.md)
+
+### Type aliases
+
+* [THashFn](_src_merklesumtree_.md#thashfn)
+* [TValue](_src_merklesumtree_.md#tvalue)
+
+## Type aliases
+
+###  THashFn
+
+Ƭ **THashFn**: *function*
+
+#### Type declaration:
+
+▸ (`value`: [TValue](_src_merklesumtree_.md#tvalue)): *Buffer*
+
+**Parameters:**
+
+Name | Type |
+------ | ------ |
+`value` | [TValue](_src_merklesumtree_.md#tvalue) |
+
+___
+
+###  TValue
+
+Ƭ **TValue**: *Buffer | BigInt | string | number | null | undefined*
diff --git a/test/MerkleSumTree.test.js b/test/MerkleSumTree.test.js
index 8346ab0..7ef72e0 100644
--- a/test/MerkleSumTree.test.js
+++ b/test/MerkleSumTree.test.js
@@ -4,7 +4,7 @@ const { MerkleSumTree, Leaf } = require('../dist/MerkleSumTree')
 
 const sha256 = (data) => crypto.createHash('sha256').update(data).digest()
 
-test('MerkleSumTree', t => {
+test('MerkleSumTree - sha256', t => {
   t.plan(4)
 
   const treeSize = 2n ** 64n