diff --git a/newtype_derive/Cargo.toml b/newtype_derive/Cargo.toml
index 3c46f4e..b2aa83e 100644
--- a/newtype_derive/Cargo.toml
+++ b/newtype_derive/Cargo.toml
@@ -17,7 +17,7 @@ std = []
 std-unstable = []
 
 [build-dependencies]
-rustc_version = "0.1.7"
+rustc_version = "0.2"
 
 [dev-dependencies]
 macro-attr = { version = "0.2.1", path = ".." }
diff --git a/newtype_derive/build.rs b/newtype_derive/build.rs
index c617b37..e4a10e0 100644
--- a/newtype_derive/build.rs
+++ b/newtype_derive/build.rs
@@ -8,12 +8,12 @@ files in the project carrying such notice may not be copied, modified,
 or distributed except according to those terms.
 */
 extern crate rustc_version;
-use rustc_version::{version_matches};
+use rustc_version::{version, Version};
 
 fn main() {
     println!("cargo:rerun-if-changed=build.rs");
 
-    if version_matches("1.8.0") {
+    if version().unwrap() >= Version::parse("1.8.0").unwrap() {
         println!("cargo:rustc-cfg=op_assign");
     }
 }