diff --git a/sasl/Cargo.toml b/sasl/Cargo.toml
index 225e9f7d..8fc9bfc5 100644
--- a/sasl/Cargo.toml
+++ b/sasl/Cargo.toml
@@ -20,6 +20,8 @@ scram = ["openssl"]
 
 [dependencies]
 base64 = "0.10"
+sha-1 = "0.8"
+sha2 = "0.8"
 
 [dependencies.openssl]
 version = "0.10.7"
diff --git a/sasl/src/common/scram.rs b/sasl/src/common/scram.rs
index 94d8bd62..e087fb39 100644
--- a/sasl/src/common/scram.rs
+++ b/sasl/src/common/scram.rs
@@ -1,10 +1,11 @@
 use openssl::pkcs5::pbkdf2_hmac;
-use openssl::hash::hash;
 use openssl::hash::MessageDigest;
 use openssl::sign::Signer;
 use openssl::pkey::PKey;
 use openssl::rand::rand_bytes;
 use openssl::error::ErrorStack;
+use sha1::{Sha1 as Sha1_hash, Digest};
+use sha2::Sha256 as Sha256_hash;
 
 use crate::common::Password;
 
@@ -46,7 +47,10 @@ impl ScramProvider for Sha1 { // TODO: look at all these unwraps
     fn name() -> &'static str { "SHA-1" }
 
     fn hash(data: &[u8]) -> Vec<u8> {
-        hash(MessageDigest::sha1(), data).unwrap().to_vec()
+        let hash = Sha1_hash::digest(data);
+        let mut vec = Vec::with_capacity(Sha1_hash::output_size());
+        vec.extend_from_slice(hash.as_slice());
+        vec
     }
 
     fn hmac(data: &[u8], key: &[u8]) -> Vec<u8> {
@@ -90,7 +94,10 @@ impl ScramProvider for Sha256 { // TODO: look at all these unwraps
     fn name() -> &'static str { "SHA-256" }
 
     fn hash(data: &[u8]) -> Vec<u8> {
-        hash(MessageDigest::sha256(), data).unwrap().to_vec()
+        let hash = Sha256_hash::digest(data);
+        let mut vec = Vec::with_capacity(Sha256_hash::output_size());
+        vec.extend_from_slice(hash.as_slice());
+        vec
     }
 
     fn hmac(data: &[u8], key: &[u8]) -> Vec<u8> {