diff --git a/Cargo.toml b/Cargo.toml
index 6e32edcab..f92dcca53 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ mio = "0.5.0"
 rand = "0.3.12"
 time = "0.1.34"
 tiny-keccak = "1.0"
-rocksdb = "0.2"
+rocksdb = "0.3"
 lazy_static = "0.1"
 eth-secp256k1 = { git = "https://github.com/arkpar/rust-secp256k1.git" }
 rust-crypto = "0.2.34"
diff --git a/src/overlaydb.rs b/src/overlaydb.rs
index 5539a8893..929a492ef 100644
--- a/src/overlaydb.rs
+++ b/src/overlaydb.rs
@@ -10,7 +10,7 @@ use std::ops::*;
 use std::sync::*;
 use std::env;
 use std::collections::HashMap;
-use rocksdb::{DB, Writable};
+use rocksdb::{DB, Writable, IteratorMode};
 
 #[derive(Clone)]
 /// Implementation of the HashDB trait for a disk-backed database with a memory overlay.
@@ -138,7 +138,7 @@ impl OverlayDB {
 impl HashDB for OverlayDB {
 	fn keys(&self) -> HashMap<H256, i32> {
 		let mut ret: HashMap<H256, i32> = HashMap::new();
-		for (key, _) in self.backing.iterator().from_start() {
+		for (key, _) in self.backing.iterator(IteratorMode::Start) {
 			let h = H256::from_slice(key.deref());
 			let r = self.payload(&h).unwrap().1;
 			ret.insert(h, r as i32);