diff --git a/src/commonMain/kotlin/com/infendro/kdf/PBKDF2.kt b/src/commonMain/kotlin/com/infendro/kdf/PBKDF2.kt
index 4259661..c09a68a 100644
--- a/src/commonMain/kotlin/com/infendro/kdf/PBKDF2.kt
+++ b/src/commonMain/kotlin/com/infendro/kdf/PBKDF2.kt
@@ -12,8 +12,8 @@ class PBKDF2(
     function: HashFunction,
 ) : KDF {
     init {
-        if (bytes < 1) throw IllegalArgumentException()
-        if (iterations < 1) throw IllegalArgumentException()
+        require(bytes > 0)
+        require(iterations > 0)
     }
 
     private val mac = HMAC(function)