diff --git a/build.gradle.kts b/build.gradle.kts
index 38fcdc1..1a8738d 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,5 @@
 group = "com.infendro"
-version = "1.2.0"
+version = "1.2.1"
 
 repositories {
     maven("https://git.infendro.com/api/packages/Infendro/maven")
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index b02d28d..2d7be34 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,7 +1,7 @@
 [versions]
 kotlin = "2.1.20"
 hash = "1.3.1"
-bytearray = "1.2.0"
+bytearray = "1.2.1"
 
 [plugins]
 multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
diff --git a/src/commonMain/kotlin/com/infendro/mac/HMAC.kt b/src/commonMain/kotlin/com/infendro/mac/HMAC.kt
index b814673..ce8fc3d 100644
--- a/src/commonMain/kotlin/com/infendro/mac/HMAC.kt
+++ b/src/commonMain/kotlin/com/infendro/mac/HMAC.kt
@@ -25,7 +25,7 @@ class HMAC(
         key: UByteArray,
     ): UByteArray {
         return when {
-            key.size > function.block -> function.hash(key)
+            key.size > function.block -> function.hash(key).padEnd(function.block, 0x00U)
             key.size < function.block -> key.padEnd(function.block, 0x00U)
             else -> key
         }