diff --git a/sim/src/tlv.rs b/sim/src/tlv.rs
index a642446..6680b4f 100644
--- a/sim/src/tlv.rs
+++ b/sim/src/tlv.rs
@@ -17,6 +17,7 @@
 use byteorder::{
     LittleEndian, WriteBytesExt,
 };
+use cipher::FromBlockCipher;
 use crate::caps::Caps;
 use crate::image::ImageVersion;
 use log::info;
@@ -29,14 +30,16 @@
     ECDSA_P256_SHA256_ASN1_SIGNING,
     Ed25519KeyPair,
 };
-use aes_ctr::{
+use aes::{
+    Aes128,
     Aes128Ctr,
+    Aes256,
     Aes256Ctr,
-    stream_cipher::{
-        generic_array::GenericArray,
-        NewStreamCipher,
-        SyncStreamCipher,
-    },
+    NewBlockCipher
+};
+use cipher::{
+    generic_array::GenericArray,
+    StreamCipher,
 };
 use mcuboot_sys::c;
 use typenum::{U16, U32};
@@ -622,11 +625,13 @@
             let mut cipherkey = self.get_enc_key();
             if aes256 {
                 let key: &GenericArray<u8, U32> = GenericArray::from_slice(&derived_key[..32]);
-                let mut cipher = Aes256Ctr::new(&key, &nonce);
+                let block = Aes256::new(&key);
+                let mut cipher = Aes256Ctr::from_block_cipher(block, &nonce);
                 cipher.apply_keystream(&mut cipherkey);
             } else {
                 let key: &GenericArray<u8, U16> = GenericArray::from_slice(&derived_key[..16]);
-                let mut cipher = Aes128Ctr::new(&key, &nonce);
+                let block = Aes128::new(&key);
+                let mut cipher = Aes128Ctr::from_block_cipher(block, &nonce);
                 cipher.apply_keystream(&mut cipherkey);
             }