diff --git a/common/eth2_testnet_config/build.rs b/common/eth2_testnet_config/build.rs
index 3d49023933..cafdfad311 100644
--- a/common/eth2_testnet_config/build.rs
+++ b/common/eth2_testnet_config/build.rs
@@ -6,7 +6,7 @@ use std::fs::File;
 use std::io::Write;
 use std::path::PathBuf;
 
-const TESTNET_ID: &str = "altona-v2";
+const TESTNET_ID: &str = "altona-v3";
 
 fn main() {
     if !base_dir().exists() {
@@ -39,7 +39,7 @@ pub fn get_all_files() -> Result<(), String> {
 
 pub fn get_file(filename: &str) -> Result<(), String> {
     let url = format!(
-        "https://raw.githubusercontent.com/sigp/witti/2bab01c2c18aea9f571e79d646acfd34704cbfde/altona/lighthouse/{}",
+        "https://raw.githubusercontent.com/sigp/witti/a94e00c1a03df851f960fcf44a79f2a6b1d29af1/altona/lighthouse/{}",
         filename
     );
 
diff --git a/common/eth2_testnet_config/src/lib.rs b/common/eth2_testnet_config/src/lib.rs
index 95d1379e14..ccaea6dbb0 100644
--- a/common/eth2_testnet_config/src/lib.rs
+++ b/common/eth2_testnet_config/src/lib.rs
@@ -23,13 +23,13 @@ pub const YAML_CONFIG_FILE: &str = "config.yaml";
 /// The name of the testnet to hardcode.
 ///
 /// Should be set to `None` when no existing testnet is compatible with the codebase.
-pub const HARDCODED_TESTNET: Option<&str> = Some("altona-v2");
+pub const HARDCODED_TESTNET: Option<&str> = Some("altona-v3");
 
-pub const HARDCODED_YAML_CONFIG: &[u8] = include_bytes!("../altona-v2/config.yaml");
-pub const HARDCODED_DEPLOY_BLOCK: &[u8] = include_bytes!("../altona-v2/deploy_block.txt");
-pub const HARDCODED_DEPOSIT_CONTRACT: &[u8] = include_bytes!("../altona-v2/deposit_contract.txt");
-pub const HARDCODED_GENESIS_STATE: &[u8] = include_bytes!("../altona-v2/genesis.ssz");
-pub const HARDCODED_BOOT_ENR: &[u8] = include_bytes!("../altona-v2/boot_enr.yaml");
+pub const HARDCODED_YAML_CONFIG: &[u8] = include_bytes!("../altona-v3/config.yaml");
+pub const HARDCODED_DEPLOY_BLOCK: &[u8] = include_bytes!("../altona-v3/deploy_block.txt");
+pub const HARDCODED_DEPOSIT_CONTRACT: &[u8] = include_bytes!("../altona-v3/deposit_contract.txt");
+pub const HARDCODED_GENESIS_STATE: &[u8] = include_bytes!("../altona-v3/genesis.ssz");
+pub const HARDCODED_BOOT_ENR: &[u8] = include_bytes!("../altona-v3/boot_enr.yaml");
 
 /// Specifies an Eth2 testnet.
 ///