diff --git a/CHANGELOG.md b/CHANGELOG.md
index e55bb24..e28afc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # CHANGELOG
 
+## Version 0.2.4 (2023-04-16)
+ - Adds `Digest.updateDigest` protected open functions for implementors 
+   to override when needing access to input before it is buffered [[#34]][34]
+ - Adds input argument check for nonJvm `Mac.update` when `offset` and `len` 
+   parameters are specified [[#35]][35]
+ - Updates `Digest.digestLength` constructor argument check to now accept 0 
+   as a valid length [[#36]][36]
+     - Previously, passing 0 would throw an `IllegalArgumentException`.
+
 ## Version 0.2.3 (2023-04-08)
  - Fix `nonJvm` `Mac.doFinal` not calling `engine.reset()` [[#27]][27]
      - Only implementation of `Mac` is `Hmac` via `MACs` repo, which is
@@ -28,3 +37,6 @@
 [25]: https://github.com/KotlinCrypto/core/pull/25
 [27]: https://github.com/KotlinCrypto/core/pull/27
 [29]: https://github.com/KotlinCrypto/core/pull/29
+[34]: https://github.com/KotlinCrypto/core/pull/34
+[35]: https://github.com/KotlinCrypto/core/pull/35
+[36]: https://github.com/KotlinCrypto/core/pull/36
diff --git a/README.md b/README.md
index f2ce35f..8017428 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,8 @@
 
 Low level core cryptographic components for Kotlin Multiplatform
 
-NOTE: For Jvm, `Digest` extends `MessageDigest` and `Mac` extends `javax.crypto.Mac` for interoperability
+NOTE: For Jvm, `Digest` extends `java.security.MessageDigest` and `Mac` extends `javax.crypto.Mac` 
+for interoperability.
 
 Utilized by [KotlinCrypto/hash][url-hash] and [KotlinCrypto/MACs][url-macs]
 
@@ -127,22 +128,22 @@ fun main() {
 
 `XOF`s (i.e. [Extendable-Output Functions][url-pub-xof]) were introduced with `SHA3`.
 
-`XOF`s are very similar to `Digest` and `Mac`, except that instead of calling `digest()` 
-or `doFinal()` which returns a fixed size `ByteArray`, their output can be however long
-you wish.
+`XOF`s are very similar to `Digest` and `Mac` except that instead of calling `digest()` 
+or `doFinal()`, which returns a fixed size `ByteArray`, their output size can be variable 
+in length.
 
 As such, [KotlinCrypto][url-kotlin-crypto] takes the approach of making them distinctly 
-separate from those types, while implementing the same interfaces (`Algorithm`, `Copyable`, 
+different from those types, while implementing the same interfaces (`Algorithm`, `Copyable`, 
 `Resettable`, `Updatable`).
 
-The only difference is that `Xof`s are read.
+Output for an `Xof` is done by reading, instead.
 
 ```kotlin
 // Using SHAKE128 from hash repo as an example
 import org.kotlincrypto.hash.sha3.SHAKE128
 
 fun main() {
-    val xof = SHAKE128.xOf()
+    val xof: Xof<SHAKE128> = SHAKE128.xOf()
     val bytes = Random.Default.nextBytes(615)
 
     // Xof implements Algorithm
@@ -177,10 +178,10 @@ fun main() {
     reader.read(out3)
     reader.read(out4)
     reader.close()
-    
+
     try {
-        // Has been closed and cannot be read from
-        // anymore.
+        // The Reader has been closed and will throw
+        // exception when trying to read from again.
         reader.use { read(out4) }
     } catch (e: IllegalStateException) {
         e.printStackTrace()
@@ -190,11 +191,12 @@ fun main() {
     // a snapshot of Xof, which was not updated
     // between production of Readers.
     assertContentEquals(out1 + out2, out3 + out4)
-    
-    // Still able to update Xof b/c Reader uses a snapshot
+
+    // Still able to update Xof, independent of the production
+    // and usage of Readers.
     xof.update(10.toByte())
     xof.use { read(out3); read(out4) }
-    
+
     try {
         assertContentEquals(out1 + out2, out3 + out4)
         throw IllegalStateException()
@@ -216,7 +218,7 @@ The best way to keep `KotlinCrypto` dependencies up to date is by using the
 ```kotlin
 // build.gradle.kts
 dependencies {
-    val core = "0.2.3"
+    val core = "0.2.4"
     implementation("org.kotlincrypto.core:digest:$core")
     implementation("org.kotlincrypto.core:mac:$core")
     implementation("org.kotlincrypto.core:xof:$core")
@@ -228,7 +230,7 @@ dependencies {
 ```groovy
 // build.gradle
 dependencies {
-    def core = "0.2.3"
+    def core = "0.2.4"
     implementation "org.kotlincrypto.core:digest:$core"
     implementation "org.kotlincrypto.core:mac:$core"
     implementation "org.kotlincrypto.core:xof:$core"
@@ -236,7 +238,7 @@ dependencies {
 ```
 
 <!-- TAG_VERSION -->
-[badge-latest-release]: https://img.shields.io/badge/latest--release-0.2.3-blue.svg?style=flat
+[badge-latest-release]: https://img.shields.io/badge/latest--release-0.2.4-blue.svg?style=flat
 [badge-license]: https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg?style=flat
 
 <!-- TAG_DEPENDENCIES -->
diff --git a/gradle.properties b/gradle.properties
index e9fad9b..653321c 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -29,7 +29,7 @@ POM_DEVELOPER_ID=KotlinCrypto
 POM_DEVELOPER_NAME=Kotlin Crypto
 POM_DEVELOPER_URL=https://github.com/KotlinCrypto/
 
-VERSION_NAME=0.2.4-SNAPSHOT
+VERSION_NAME=0.2.4
 # 0.1.0-alpha01 = 00 01 00 11
 # 0.1.0-beta01  = 00 01 00 21
 # 0.1.0-rc01    = 00 01 00 31