diff --git a/README.md b/README.md
index e693b49..688045b 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,8 @@
 
 Supported [PRNG](https://en.wikipedia.org/wiki/Pseudorandom_number_generator) algorithms:
 - LCG
-- Xoshiro256++
-- Xoshiro256**
+- xoshiro256++
+- xoshiro256**
 
 Supported [CSPRNG](https://en.wikipedia.org/wiki/Cryptographically_secure_pseudorandom_number_generator) algorithms:
 - HMAC-DRBG
@@ -20,7 +20,7 @@ repositories {
 }
 
 dependencies {
-    implementation("com.infendro:prng:1.3.0")
+    implementation("com.infendro:prng:1.3.1")
 }
 ```
 
@@ -29,7 +29,7 @@ dependencies {
 ```kotlin
 fun main() {
     // create PRNG instance
-    val rng = CSPRNG.HMAC(`SHA-256`)
+    val rng = CSPRNG.HMAC(`SHA-256`())
 
     // seed PRNG to receive deterministic numbers
     rng.seed(/* seed */)
diff --git a/build.gradle.kts b/build.gradle.kts
index 267fc8f..1e920ac 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -5,7 +5,7 @@ import com.infendro.plugin.token
 import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 
 group = "com.infendro"
-version = "1.3.0"
+version = "1.3.1"
 
 plugins {
     alias(libs.plugins.infendro)
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 4215199..07641bb 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,9 +1,9 @@
 [versions]
 infendro = "1.1.0"
 kotlin = "2.3.0"
-bytes = "1.4.0"
-hash = "1.6.0"
-mac = "1.4.0"
+bytes = "1.4.2"
+hash = "1.7.0"
+mac = "1.5.0"
 
 [plugins]
 infendro = { id = "com.infendro.plugin", version.ref = "infendro" }
diff --git a/src/commonMain/kotlin/com/infendro/random/prng/LCG.kt b/src/commonMain/kotlin/com/infendro/random/prng/LCG.kt
index 085e622..7ccf4f1 100644
--- a/src/commonMain/kotlin/com/infendro/random/prng/LCG.kt
+++ b/src/commonMain/kotlin/com/infendro/random/prng/LCG.kt
@@ -6,6 +6,8 @@ import com.infendro.random.PRNG
 import kotlin.properties.Delegates.notNull
 
 class LCG : PRNG() {
+    private val function = `SHA-256`()
+
     private val a: Long = 25214903917L
     private val c: Long = 11L
     private val mask: Long = (1L shl 48) - 1
@@ -13,7 +15,7 @@ class LCG : PRNG() {
     private var x: Long by notNull()
 
     override fun seed(seed: ByteArray) {
-        x = `SHA-256`.hash(seed).toLong() and mask
+        x = function.hash(seed).toLong() and mask
     }
 
     override fun generate(): Int {
diff --git a/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256pp.kt b/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256pp.kt
index ff60ce8..1297334 100644
--- a/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256pp.kt
+++ b/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256pp.kt
@@ -6,10 +6,12 @@ import com.infendro.random.PRNG
 import kotlin.properties.Delegates.notNull
 
 class Xoshiro256pp : PRNG() {
+    private val function = `SHA-256`()
+
     private var s: LongArray by notNull()
 
     override fun seed(seed: ByteArray) {
-        s = `SHA-256`.hash(seed).toLongArray()
+        s = function.hash(seed).toLongArray()
     }
 
     override fun generate(): Int {
diff --git a/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256ss.kt b/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256ss.kt
index 6fbfb1a..0eeb4db 100644
--- a/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256ss.kt
+++ b/src/commonMain/kotlin/com/infendro/random/prng/Xoshiro256ss.kt
@@ -6,10 +6,12 @@ import com.infendro.random.PRNG
 import kotlin.properties.Delegates.notNull
 
 class Xoshiro256ss : PRNG() {
+    private val function = `SHA-256`()
+
     private var s: LongArray by notNull()
 
     override fun seed(seed: ByteArray) {
-        s = `SHA-256`.hash(seed).toLongArray()
+        s = function.hash(seed).toLongArray()
     }
 
     override fun generate(): Int {