diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/Crypto.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/Crypto.kt
index 163dffea01..af150b34fa 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/Crypto.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/Crypto.kt
@@ -1,7 +1,19 @@
 package dev.inmo.tgbotapi.utils
 
+import dev.inmo.micro_utils.crypto.SourceBytes
 import dev.inmo.micro_utils.crypto.SourceString
 
 internal expect fun SourceString.hmacSha256(key: String): String
+private val HEX_ARRAY = "0123456789abcdef".toCharArray()
 
-internal expect fun SourceString.hex(): String
+internal fun SourceBytes.hex(): String {
+    val hexChars = CharArray(size * 2)
+    for (j in indices) {
+        val v: Int = this[j].toInt() and 0xFF
+        hexChars[j * 2] = HEX_ARRAY[v ushr 4]
+        hexChars[j * 2 + 1] = HEX_ARRAY[v and 0x0F]
+    }
+    return hexChars.concatToString()
+}
+
+internal fun SourceString.hex(): String = encodeToByteArray().hex()
diff --git a/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt b/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt
index 821bdea167..a8b23eae8a 100644
--- a/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt
+++ b/tgbotapi.core/src/jsMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt
@@ -3,6 +3,4 @@ package dev.inmo.tgbotapi.utils
 import dev.inmo.micro_utils.crypto.CryptoJS
 import dev.inmo.micro_utils.crypto.SourceString
 
-actual fun SourceString.hmacSha256(key: String) = CryptoJS.asDynamic().HmacSHA256(this, key).unsafeCast<String>()
-
-actual fun SourceString.hex() = CryptoJS.asDynamic().format.Hex(this).unsafeCast<String>()
+actual fun SourceString.hmacSha256(key: String) = CryptoJS.asDynamic().HmacSHA256(this, key).toString().unsafeCast<String>()
diff --git a/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt b/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt
index 7a63c5f7e6..65075f0119 100644
--- a/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt
+++ b/tgbotapi.core/src/jvmMain/kotlin/dev/inmo/tgbotapi/utils/CryptoActual.kt
@@ -1,22 +1,9 @@
 package dev.inmo.tgbotapi.utils
 
-import dev.inmo.micro_utils.crypto.SourceBytes
 import dev.inmo.micro_utils.crypto.SourceString
 import javax.crypto.Mac
 import javax.crypto.spec.SecretKeySpec
 
-val HEX_ARRAY = "0123456789ABCDEF".toCharArray()
-
-private fun SourceBytes.hex(): String {
-    val hexChars = CharArray(size * 2)
-    for (j in indices) {
-        val v: Int = this[j].toInt() and 0xFF
-        hexChars[j * 2] = HEX_ARRAY[v ushr 4]
-        hexChars[j * 2 + 1] = HEX_ARRAY[v and 0x0F]
-    }
-    return String(hexChars)
-}
-
 actual fun SourceString.hmacSha256(key: String): String {
     val mac = Mac.getInstance("HmacSHA256")
 
@@ -25,5 +12,3 @@ actual fun SourceString.hmacSha256(key: String): String {
 
     return mac.doFinal(toByteArray()).hex()
 }
-
-actual fun SourceString.hex(): String = toByteArray().hex()