diff --git a/Cargo.toml b/Cargo.toml
index c46bffc..f61d3c3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,7 +35,6 @@ version = "^0.6"
 
 [dev-dependencies]
 rustc-serialize = "0.3"
-blake2 = "^0.4"
 sha2 = "^0.4"
 
 [features]
diff --git a/src/ed25519.rs b/src/ed25519.rs
index f486320..fda76cd 100644
--- a/src/ed25519.rs
+++ b/src/ed25519.rs
@@ -494,7 +494,6 @@ mod test {
 
 #[cfg(all(test, feature = "bench"))]
 mod bench {
-    use blake2::Blake2b;
     use test::Bencher;
     use rand::OsRng;
     use sha2::Sha512;
@@ -544,30 +543,4 @@ mod bench {
 
         b.iter(| | Keypair::generate::<Sha512>(&mut rng));
     }
-
-    #[bench]
-    fn blake2b_sign(b: &mut Bencher) {
-        let mut cspring: OsRng = OsRng::new().unwrap();
-        let keypair: Keypair = Keypair::generate::<Blake2b>(&mut cspring);
-        let msg: &[u8] = "".as_bytes();
-
-        b.iter(| | keypair.sign::<Blake2b>(msg));
-    }
-
-    #[bench]
-    fn blake2b_verify(b: &mut Bencher) {
-        let mut cspring: OsRng = OsRng::new().unwrap();
-        let keypair: Keypair = Keypair::generate::<Blake2b>(&mut cspring);
-        let msg: &[u8] = "".as_bytes();
-        let sig: Signature = keypair.sign::<Blake2b>(msg);
-
-        b.iter(| | keypair.verify::<Blake2b>(msg, &sig));
-    }
-
-    #[bench]
-    fn blake2b_key_generation(b: &mut Bencher) {
-        let mut rng: ZeroRng = ZeroRng::new();
-
-        b.iter(| | Keypair::generate::<Blake2b>(&mut rng));
-    }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 45d96af..c5ca4a8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -130,9 +130,6 @@ extern crate rustc_serialize;
 #[cfg(all(test, feature = "bench"))]
 extern crate test;
 
-#[cfg(all(test, feature = "bench"))]
-extern crate blake2;
-
 
 mod ed25519;