diff --git a/src/main/java/Aes.kt b/src/main/java/Aes.kt
index f7da4db..69d1fa3 100644
--- a/src/main/java/Aes.kt
+++ b/src/main/java/Aes.kt
@@ -17,10 +17,10 @@ class Aes {
             val key = generateKey()
             val seed = SecureRandom().generateSeed(16)
             val iv = IvParameterSpec(seed)
-            encryptCipher = Cipher.getInstance("AES/CBC/PKCS7Padding").apply {
+            encryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding").apply {
                 init(Cipher.ENCRYPT_MODE, key, iv)
             }
-            decryptCipher = Cipher.getInstance("AES/CBC/PKCS7Padding").apply {
+            decryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding").apply {
                 init(Cipher.DECRYPT_MODE, key, iv)
             }
         } catch (e: Exception) {
@@ -32,10 +32,10 @@ class Aes {
         try {
             val key = SecretKeySpec(keyArr, "AES")
             val iv = IvParameterSpec(ivArr)
-            encryptCipher = Cipher.getInstance("AES/CBC/PKCS7Padding").apply {
+            encryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding").apply {
                 init(Cipher.ENCRYPT_MODE, key, iv)
             }
-            decryptCipher = Cipher.getInstance("AES/CBC/PKCS7Padding").apply {
+            decryptCipher = Cipher.getInstance("AES/CBC/PKCS5Padding").apply {
                 init(Cipher.DECRYPT_MODE, key, iv)
             }
         } catch (e: NoSuchAlgorithmException) {