diff --git a/Cargo.toml b/Cargo.toml
index 53040ea..c63b3b3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ed25519-dalek"
-version = "0.6.0"
+version = "0.6.1"
 authors = ["Isis Lovecruft <isis@patternsinthevoid.net>"]
 readme = "README.md"
 license = "BSD-3-Clause"
@@ -28,7 +28,7 @@ optional = true
 version = "0.4"
 
 [dependencies.digest]
-version = "0.6"
+version = "^0.7"
 
 [dependencies.generic-array]
 # same version that digest depends on
@@ -39,7 +39,7 @@ version = "^1.0"
 optional = true
 
 [dependencies.sha2]
-version = "0.6"
+version = "^0.7"
 optional = true
 
 [dependencies.failure]
@@ -47,8 +47,8 @@ version = "^0.1.1"
 default-features = false
 
 [dev-dependencies]
-hex = "0.3"
-sha2 = "0.6"
+hex = "^0.3"
+sha2 = "^0.7"
 bincode = "^0.9"
 
 [features]
diff --git a/src/ed25519.rs b/src/ed25519.rs
index b01077b..dcfec7f 100644
--- a/src/ed25519.rs
+++ b/src/ed25519.rs
@@ -910,7 +910,9 @@ impl<'d> Deserialize<'d> for Keypair {
             type Value = Keypair;
 
             fn expecting(&self, formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-                formatter.write_str("An ed25519 signature as specified in RFC8032")
+                formatter.write_str("An ed25519 keypair, 64 bytes in total where the secret key is \
+                                     the first 32 bytes and is in unexpanded form, and the second \
+                                     32 bytes is a compressed point for a public key.")
             }
 
             fn visit_bytes<E>(self, bytes: &[u8]) -> Result<Keypair, E> where E: SerdeError {
@@ -1143,8 +1145,8 @@ mod bench {
 
     #[bench]
     fn sign(b: &mut Bencher) {
-        let mut cspring: OsRng = OsRng::new().unwrap();
-        let keypair: Keypair = Keypair::generate::<Sha512>(&mut cspring);
+        let mut csprng: OsRng = OsRng::new().unwrap();
+        let keypair: Keypair = Keypair::generate::<Sha512>(&mut csprng);
         let msg: &[u8] = b"";
 
         b.iter(| | keypair.sign::<Sha512>(msg));
@@ -1152,8 +1154,8 @@ mod bench {
 
     #[bench]
     fn sign_expanded_key(b: &mut Bencher) {
-        let mut cspring: OsRng = OsRng::new().unwrap();
-        let keypair: Keypair = Keypair::generate::<Sha512>(&mut cspring);
+        let mut csprng: OsRng = OsRng::new().unwrap();
+        let keypair: Keypair = Keypair::generate::<Sha512>(&mut csprng);
         let expanded: ExpandedSecretKey = keypair.secret.expand::<Sha512>();
         let msg: &[u8] = b"";
 
@@ -1162,8 +1164,8 @@ mod bench {
 
     #[bench]
     fn verify(b: &mut Bencher) {
-        let mut cspring: OsRng = OsRng::new().unwrap();
-        let keypair: Keypair = Keypair::generate::<Sha512>(&mut cspring);
+        let mut csprng: OsRng = OsRng::new().unwrap();
+        let keypair: Keypair = Keypair::generate::<Sha512>(&mut csprng);
         let msg: &[u8] = b"";
         let sig: Signature = keypair.sign::<Sha512>(msg);