diff --git a/util/memory_cache/Cargo.toml b/util/memory_cache/Cargo.toml
new file mode 100644
index 000000000..9179b3c8a
--- /dev/null
+++ b/util/memory_cache/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "memory_cache"
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+description = "An LRU-cache which operates on memory used"
+license = "GPL3"
+
+[dependencies]
+heapsize = "0.4"
+lru-cache = "0.1"
diff --git a/util/src/cache.rs b/util/memory_cache/src/lib.rs
similarity index 98%
rename from util/src/cache.rs
rename to util/memory_cache/src/lib.rs
index e6f204192..af70b0cff 100644
--- a/util/src/cache.rs
+++ b/util/memory_cache/src/lib.rs
@@ -18,6 +18,9 @@
 //! crate.
 // TODO: push changes upstream in a clean way.
 
+extern crate heapsize;
+extern crate lru_cache;
+
 use heapsize::HeapSizeOf;
 use lru_cache::LruCache;
 
diff --git a/util/src/lib.rs b/util/src/lib.rs
index 863f811c4..7de3c4b39 100644
--- a/util/src/lib.rs
+++ b/util/src/lib.rs
@@ -116,7 +116,6 @@ extern crate log as rlog;
 pub mod misc;
 pub mod overlaydb;
 pub mod journaldb;
-pub mod cache;
 
 pub use misc::*;
 pub use hashdb::*;