diff --git a/beacon_node/eth1/src/http.rs b/beacon_node/eth1/src/http.rs
index 404e357d19..b0de6542db 100644
--- a/beacon_node/eth1/src/http.rs
+++ b/beacon_node/eth1/src/http.rs
@@ -23,7 +23,7 @@ use types::Hash256;
 pub const DEPOSIT_EVENT_TOPIC: &str =
     "0x649bbc62d0e31342afea4e5cd82d4049e7e1ee912fc0889aa790803be39038c5";
 /// `keccak("get_deposit_root()")[0..4]`
-pub const DEPOSIT_ROOT_FN_SIGNATURE: &str = "0x863a311b";
+pub const DEPOSIT_ROOT_FN_SIGNATURE: &str = "0xc5f2892f";
 /// `keccak("get_deposit_count()")[0..4]`
 pub const DEPOSIT_COUNT_FN_SIGNATURE: &str = "0x621fd130";
 
diff --git a/eth2/utils/deposit_contract/.gitignore b/eth2/utils/deposit_contract/.gitignore
index 81b46ff033..2af4fb80c7 100644
--- a/eth2/utils/deposit_contract/.gitignore
+++ b/eth2/utils/deposit_contract/.gitignore
@@ -1 +1 @@
-contract/
+contracts/
diff --git a/eth2/utils/deposit_contract/build.rs b/eth2/utils/deposit_contract/build.rs
index 5923788793..f5b059983e 100644
--- a/eth2/utils/deposit_contract/build.rs
+++ b/eth2/utils/deposit_contract/build.rs
@@ -3,21 +3,23 @@
 //!
 //! These files are required for some `include_bytes` calls used in this crate.
 
-use reqwest::Response;
 use serde_json::Value;
 use std::env;
 use std::fs::File;
 use std::io::Write;
 use std::path::PathBuf;
 
-const GITHUB_RAW: &str = "https://raw.githubusercontent.com";
-const SPEC_REPO: &str = "ethereum/eth2.0-specs";
-const SPEC_TAG: &str = "v0.8.3";
-const ABI_FILE: &str = "validator_registration.json";
-const BYTECODE_FILE: &str = "validator_registration.bytecode";
+const TAG: &str = "v0.9.2";
+
+fn spec_url() -> String {
+    format!("https://raw.githubusercontent.com/ethereum/eth2.0-specs/{}/deposit_contract/contracts/validator_registration.json", TAG)
+}
+fn testnet_url() -> String {
+    format!("https://raw.githubusercontent.com/sigp/unsafe-eth2-deposit-contract/{}/unsafe_validator_registration.json", TAG)
+}
 
 fn main() {
-    match init_deposit_contract_abi() {
+    match get_all_contracts() {
         Ok(()) => (),
         Err(e) => panic!(e),
     }
@@ -25,14 +27,33 @@ fn main() {
 
 /// Attempts to download the deposit contract ABI from github if a local copy is not already
 /// present.
-pub fn init_deposit_contract_abi() -> Result<(), String> {
-    let abi_file = abi_dir().join(format!("{}_{}", SPEC_TAG, ABI_FILE));
-    let bytecode_file = abi_dir().join(format!("{}_{}", SPEC_TAG, BYTECODE_FILE));
+pub fn get_all_contracts() -> Result<(), String> {
+    download_deposit_contract(
+        &spec_url(),
+        "validator_registration.json",
+        "validator_registration.bytecode",
+    )?;
+    download_deposit_contract(
+        &testnet_url(),
+        "testnet_validator_registration.json",
+        "testnet_validator_registration.bytecode",
+    )
+}
+
+/// Attempts to download the deposit contract ABI from github if a local copy is not already
+/// present.
+pub fn download_deposit_contract(
+    url: &str,
+    abi_file: &str,
+    bytecode_file: &str,
+) -> Result<(), String> {
+    let abi_file = abi_dir().join(format!("{}_{}", TAG, abi_file));
+    let bytecode_file = abi_dir().join(format!("{}_{}", TAG, bytecode_file));
 
     if abi_file.exists() {
         // Nothing to do.
     } else {
-        match download_abi() {
+        match reqwest::get(url) {
             Ok(mut response) => {
                 let mut abi_file = File::create(abi_file)
                     .map_err(|e| format!("Failed to create local abi file: {:?}", e))?;
@@ -71,22 +92,13 @@ pub fn init_deposit_contract_abi() -> Result<(), String> {
     Ok(())
 }
 
-/// Attempts to download the deposit contract file from the Ethereum github.
-fn download_abi() -> Result<Response, String> {
-    reqwest::get(&format!(
-        "{}/{}/{}/deposit_contract/contracts/{}",
-        GITHUB_RAW, SPEC_REPO, SPEC_TAG, ABI_FILE
-    ))
-    .map_err(|e| format!("Failed to download deposit ABI from github: {:?}", e))
-}
-
 /// Returns the directory that will be used to store the deposit contract ABI.
 fn abi_dir() -> PathBuf {
     let base = env::var("CARGO_MANIFEST_DIR")
         .expect("should know manifest dir")
         .parse::<PathBuf>()
         .expect("should parse manifest dir as path")
-        .join("contract");
+        .join("contracts");
 
     std::fs::create_dir_all(base.clone())
         .expect("should be able to create abi directory in manifest");
diff --git a/eth2/utils/deposit_contract/src/lib.rs b/eth2/utils/deposit_contract/src/lib.rs
index c4f2f1ef68..b0c052ede6 100644
--- a/eth2/utils/deposit_contract/src/lib.rs
+++ b/eth2/utils/deposit_contract/src/lib.rs
@@ -1,21 +1,32 @@
 use ethabi::{Contract, Token};
 use ssz::Encode;
+use tree_hash::TreeHash;
 use types::DepositData;
 
 pub use ethabi::Error;
 
 pub const CONTRACT_DEPLOY_GAS: usize = 4_000_000;
 pub const DEPOSIT_GAS: usize = 4_000_000;
-pub const ABI: &[u8] = include_bytes!("../contract/v0.8.3_validator_registration.json");
-pub const BYTECODE: &[u8] = include_bytes!("../contract/v0.8.3_validator_registration.bytecode");
+pub const ABI: &[u8] = include_bytes!("../contracts/v0.9.2_validator_registration.json");
+pub const BYTECODE: &[u8] = include_bytes!("../contracts/v0.9.2_validator_registration.bytecode");
+
+pub mod testnet {
+    pub const ABI: &[u8] =
+        include_bytes!("../contracts/v0.9.2_testnet_validator_registration.json");
+    pub const BYTECODE: &[u8] =
+        include_bytes!("../contracts/v0.9.2_testnet_validator_registration.bytecode");
+}
 
 pub fn eth1_tx_data(deposit_data: &DepositData) -> Result<Vec<u8>, Error> {
     let params = vec![
         Token::Bytes(deposit_data.pubkey.as_ssz_bytes()),
         Token::Bytes(deposit_data.withdrawal_credentials.as_ssz_bytes()),
         Token::Bytes(deposit_data.signature.as_ssz_bytes()),
+        Token::FixedBytes(deposit_data.tree_hash_root().as_ssz_bytes()),
     ];
 
+    // Here we make an assumption that the `crate::testnet::ABI` has a superset of the features of
+    // the crate::ABI`.
     let abi = Contract::load(ABI)?;
     let function = abi.function("deposit")?;
     function.encode_input(&params)