diff --git a/src/lib.rs b/src/lib.rs
index 91c2ef1..5a760e4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,12 +15,11 @@
 */
 #![crate_id = "rocksdb"]
 #![crate_type = "lib"]
-#![feature(collections)]
-#![feature(core)]
 #![feature(libc)]
 #![feature(unique)]
 #![feature(path_ext)]
-
+#![feature(raw)]
+#![feature(vec_push_all)]
 
 pub use ffi as rocksdb_ffi;
 pub use ffi::{
diff --git a/src/main.rs b/src/main.rs
index 7458057..027ab76 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -15,6 +15,7 @@
 */
 #![feature(collections)]
 #![feature(test)]
+#![feature(vec_push_all)]
 
 extern crate rocksdb;
 extern crate test;