diff --git a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256.jvmAndroid.kt b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256.jvmAndroid.kt
index 25fffbde9..17234cfa9 100644
--- a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256.jvmAndroid.kt
+++ b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256.jvmAndroid.kt
@@ -32,12 +32,12 @@ actual fun sha256(data: ByteArray) = pool.hash(data)
  * This is more efficient than reading the stream twice.
  *
  * @param inputStream The input stream to hash
- * @param bufferSize Size of chunks to read (default 64KB)
+ * @param bufferSize Size of chunks to read (default 8KB)
  * @return Pair of (hash bytes, bytes read count)
  */
 fun sha256StreamWithCount(
     inputStream: InputStream,
-    bufferSize: Int = 65536,
+    bufferSize: Int = 8192,
 ): Pair<ByteArray, Long> {
     val countingStream = CountingInputStream(inputStream)
     val hash = pool.hashStream(countingStream, bufferSize)
diff --git a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Hasher.jvmAndroid.kt b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Hasher.jvmAndroid.kt
index aabd5ab00..04354963f 100644
--- a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Hasher.jvmAndroid.kt
+++ b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Hasher.jvmAndroid.kt
@@ -37,12 +37,12 @@ class Sha256Hasher {
      * This avoids loading the entire input into memory at once.
      *
      * @param inputStream The input stream to hash
-     * @param bufferSize Size of chunks to read (default 64KB)
+     * @param bufferSize Size of chunks to read (default 8KB)
      * @return SHA256 hash bytes
      */
     fun hashStream(
         inputStream: InputStream,
-        bufferSize: Int = 65536,
+        bufferSize: Int = 8192,
     ): ByteArray {
         val buffer = ByteArray(bufferSize)
         try {
diff --git a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Pool.jvmAndroid.kt b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Pool.jvmAndroid.kt
index 86cd0dbf9..8efa3c65c 100644
--- a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Pool.jvmAndroid.kt
+++ b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/utils/sha256/Sha256Pool.jvmAndroid.kt
@@ -61,12 +61,12 @@ class Sha256Pool(
      * This avoids loading the entire input into memory at once.
      *
      * @param inputStream The input stream to hash
-     * @param bufferSize Size of chunks to read (default 64KB)
+     * @param bufferSize Size of chunks to read (default 8KB)
      * @return SHA256 hash bytes
      */
     fun hashStream(
         inputStream: InputStream,
-        bufferSize: Int = 65536,
+        bufferSize: Int = 8192,
     ): ByteArray {
         val hasher = acquire()
         try {