diff --git a/Cargo.toml b/Cargo.toml
index 6fde4f8..ee7b70f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,16 +12,13 @@ build = "build.rs"
 rustc_version = "0.2"
 
 [dependencies]
-rustc-hex = { version = "1.0", optional = true }
-heapsize = { version = "0.4", optional = true }
 byteorder = { version = "1", default-features = false }
-
-[dev-dependencies]
-quickcheck = "0.4"
+heapsize = { version = "0.4", optional = true }
+rustc-hex = { version = "1.0", optional = true }
 
 [features]
-heapsizeof = ["heapsize", "std"]
 std = ["rustc-hex"]
+heapsizeof = ["heapsize"]
 
 [[example]]
 name = "modular"