diff --git a/Cargo.toml b/Cargo.toml
index 7cabfaa..86acab3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "cryptohelpers"
-version = "1.8.2"
+version = "2.0.0"
 license= "MIT"
 description = "Collection of helpers and simplifying functions for cryptography things"
 authors = ["Avril <flanchan@cumallover.me>"]
@@ -17,7 +17,7 @@ getrandom = {version = "0.1", optional = true }
 crc = {version = "1.8", optional = true }
 hex-literal = {version = "0.3", optional = true }
 libc = "0.2"
-tokio = {version = "0.2", features=["io-util"], optional=true}
+tokio = { version = "^1.17", features = ["io-util"], optional = true }
 serde_derive = {version = "1.0", optional = true}
 serde = {version = "1.0", optional = true}
 futures = {version = "0.3.8", optional=true}
diff --git a/src/aes.rs b/src/aes.rs
index b4fbec5..83d0b32 100644
--- a/src/aes.rs
+++ b/src/aes.rs
@@ -14,12 +14,11 @@ use openssl::{
     },
 };
 #[cfg(feature="async")]
-use tokio::{
-    io::{
-	AsyncRead,
-	AsyncWrite,
-    },
-    prelude::*,
+use tokio::io::{
+    AsyncRead,
+    AsyncReadExt,
+    AsyncWrite,
+    AsyncWriteExt,
 };
 use getrandom::getrandom;
 
diff --git a/src/crc.rs b/src/crc.rs
index f8d6c7f..3a45752 100644
--- a/src/crc.rs
+++ b/src/crc.rs
@@ -11,9 +11,9 @@ use crc::{
     Hasher64,
 };
 #[cfg(feature="async")]
-use tokio::{
-    prelude::*,
-    io::AsyncRead,
+use tokio::io::{
+    AsyncRead,
+    AsyncReadExt,
 };
 use consts::BUFFER_SIZE;
 
diff --git a/src/rsa/crypt.rs b/src/rsa/crypt.rs
index 8e0c517..da3ec30 100644
--- a/src/rsa/crypt.rs
+++ b/src/rsa/crypt.rs
@@ -13,12 +13,11 @@ use openssl::{
     pkey::HasPrivate,
 };
 #[cfg(feature="async")]
-use tokio::{
-    io::{
-	AsyncWrite,
-	AsyncRead,
-    },
-    prelude::*,
+use tokio::io::{
+    AsyncWrite,
+    AsyncWriteExt,
+    AsyncRead,
+    AsyncReadExt,
 };
 
 use consts::RSA_PADDING_NEEDS as PADDING_NEEDS;
diff --git a/src/rsa/private.rs b/src/rsa/private.rs
index aeeb4ae..6039820 100644
--- a/src/rsa/private.rs
+++ b/src/rsa/private.rs
@@ -37,12 +37,11 @@ use openssl::{
     symm::Cipher,
 };
 #[cfg(feature="async")] 
-use tokio::{
-    io::{
-	AsyncWrite,
-	AsyncRead,
-    },
-    prelude::*,
+use tokio::io::{
+    AsyncWrite,
+    AsyncWriteExt,
+    AsyncRead,
+    AsyncReadExt,
 };
 
 /// Container for the private & public parts of an RSA key
diff --git a/src/rsa/public.rs b/src/rsa/public.rs
index eccfaa7..92a853d 100644
--- a/src/rsa/public.rs
+++ b/src/rsa/public.rs
@@ -33,12 +33,11 @@ use openssl::{
     },
 };
 #[cfg(feature="async")]
-use tokio::{
-    io::{
-	AsyncWrite,
-	AsyncRead,
-    },
-    prelude::*,
+use tokio::io::{
+    AsyncWrite,
+    AsyncWriteExt,
+    AsyncRead,
+    AsyncReadExt,
 };
 
 /// Container for RSA public key components
diff --git a/src/rsa/sign.rs b/src/rsa/sign.rs
index fb3246a..1741a14 100644
--- a/src/rsa/sign.rs
+++ b/src/rsa/sign.rs
@@ -27,11 +27,9 @@ use openssl::{
     },
 };
 #[cfg(feature="async")] 
-use tokio::{
-    io::{
-	AsyncRead,
-    },
-    prelude::*,
+use tokio::io::{
+    AsyncRead,
+    AsyncReadExt,
 };
 use consts::RSA_SIG_SIZE as SIZE;
 use consts::BUFFER_SIZE;
diff --git a/src/sha256.rs b/src/sha256.rs
index 50b8ecd..abd1b51 100644
--- a/src/sha256.rs
+++ b/src/sha256.rs
@@ -10,9 +10,9 @@ use sha2::{
     Digest, Sha256,
 };
 #[cfg(feature="async")] 
-use tokio::{
-    io::AsyncRead,
-    prelude::*,
+use tokio::io::{
+    AsyncRead,
+    AsyncReadExt,
 };
 
 pub const SIZE: usize = consts::SHA256_SIZE;