diff --git a/rust/cardano-blockchain-types/Cargo.toml b/rust/cardano-blockchain-types/Cargo.toml
index 277aea3385..8bf663ed4d 100644
--- a/rust/cardano-blockchain-types/Cargo.toml
+++ b/rust/cardano-blockchain-types/Cargo.toml
@@ -18,10 +18,11 @@ crate-type = ["cdylib", "rlib"]
 workspace = true
 
 [dependencies]
-pallas = { version = "0.33.0" }
-# pallas-hardano = { version = "0.33.0" }
-catalyst-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "catalyst-types-v0.0.5" }
-cbork-utils = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "cbork-utils-v0.0.2" }
+pallas = { version = "0.33.0", git = "https://github.com/input-output-hk/catalyst-pallas.git", branch = "test/testnet-genesis-values",  package = "pallas"  }
+# pallas-hardano = { version = "0.33.0", git = "https://github.com/input-output-hk/catalyst-pallas.git", branch = "test/testnet-genesis-values" }
+catalyst-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
+cbork-utils = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
+
 
 ouroboros = "0.18.4"
 tracing = "0.1.41"
diff --git a/rust/cardano-blockchain-types/src/data/devnet-genesis.vkey b/rust/cardano-blockchain-types/src/data/devnet-genesis.vkey
new file mode 100644
index 0000000000..a7530de44e
--- /dev/null
+++ b/rust/cardano-blockchain-types/src/data/devnet-genesis.vkey
@@ -0,0 +1 @@
+5b33322c3235332c3138362c3230312c3137372c31312c3131372c3133352c3138372c3136372c3138312c3138382c32322c35392c3230362c3130352c3233312c3135302c3231352c33302c37382c3231322c37362c31362c3235322c3138302c37322c3133342c3133372c3234372c3136312c36385d
\ No newline at end of file
diff --git a/rust/cardano-blockchain-types/src/metadata/cip36/validation.rs b/rust/cardano-blockchain-types/src/metadata/cip36/validation.rs
index ea80474435..0f8cecac24 100644
--- a/rust/cardano-blockchain-types/src/metadata/cip36/validation.rs
+++ b/rust/cardano-blockchain-types/src/metadata/cip36/validation.rs
@@ -89,7 +89,7 @@ impl Cip36 {
 
         let valid = match self.network {
             Network::Mainnet => network_tag.value() == 1,
-            Network::Preprod | Network::Preview => network_tag.value() == 0,
+            Network::Preprod | Network::Preview | Network::Devnet => network_tag.value() == 0,
         };
 
         // Report invalid network tag if necessary
diff --git a/rust/cardano-blockchain-types/src/network.rs b/rust/cardano-blockchain-types/src/network.rs
index 1a64f03acc..7312795ebf 100644
--- a/rust/cardano-blockchain-types/src/network.rs
+++ b/rust/cardano-blockchain-types/src/network.rs
@@ -7,7 +7,7 @@ use catalyst_types::conversion::from_saturating;
 use chrono::{DateTime, Utc};
 use pallas::{
     ledger::{addresses::Network as PallasNetwork, traverse::wellknown::GenesisValues},
-    network::miniprotocols::{MAINNET_MAGIC, PREVIEW_MAGIC, PRE_PRODUCTION_MAGIC},
+    network::miniprotocols::{MAINNET_MAGIC, PREVIEW_MAGIC, PRE_PRODUCTION_MAGIC, TESTNET_MAGIC},
 };
 use tracing::debug;
 
@@ -45,6 +45,8 @@ pub enum Network {
     Preprod = 1,
     /// Cardano preview network.
     Preview = 2,
+    /// Cardano testnet network.
+    Devnet = 3
 }
 
 // Mainnet Defaults.
@@ -74,6 +76,15 @@ const DEFAULT_PREVIEW_MITHRIL_GENESIS_KEY: &str = include_str!("data/preview-gen
 const DEFAULT_PREVIEW_MITHRIL_AGGREGATOR: &str =
     "https://aggregator.pre-release-preview.api.mithril.network/aggregator";
 
+// Devnet Defaults
+/// Devnet Default Public Cardano Relay.
+const DEFAULT_DEVNET_RELAY: &str = "127.0.0.1:3001";
+/// Preprod network Mithril Signature genesis vkey.
+const DEFAULT_DEVNET_MITHRIL_GENESIS_KEY: &str = include_str!("data/devnet-genesis.vkey");
+/// Default Mithril Aggregator to use.
+const DEFAULT_DEVNET_MITHRIL_AGGREGATOR: &str =
+    "http://localhost:8080/aggregator";
+
 impl Network {
     /// Get the default Relay for a blockchain network.
     #[must_use]
@@ -82,6 +93,7 @@ impl Network {
             Network::Mainnet => DEFAULT_MAINNET_RELAY.to_string(),
             Network::Preprod => DEFAULT_PREPROD_RELAY.to_string(),
             Network::Preview => DEFAULT_PREVIEW_RELAY.to_string(),
+            Network::Devnet => DEFAULT_DEVNET_RELAY.to_string(),
         }
     }
 
@@ -92,6 +104,7 @@ impl Network {
             Network::Mainnet => DEFAULT_MAINNET_MITHRIL_AGGREGATOR.to_string(),
             Network::Preprod => DEFAULT_PREPROD_MITHRIL_AGGREGATOR.to_string(),
             Network::Preview => DEFAULT_PREVIEW_MITHRIL_AGGREGATOR.to_string(),
+            Network::Devnet => DEFAULT_DEVNET_MITHRIL_AGGREGATOR.to_string(),
         }
     }
 
@@ -102,6 +115,7 @@ impl Network {
             Network::Mainnet => DEFAULT_MAINNET_MITHRIL_GENESIS_KEY.to_string(),
             Network::Preprod => DEFAULT_PREPROD_MITHRIL_GENESIS_KEY.to_string(),
             Network::Preview => DEFAULT_PREVIEW_MITHRIL_GENESIS_KEY.to_string(),
+            Network::Devnet => DEFAULT_DEVNET_MITHRIL_GENESIS_KEY.to_string(),
         }
     }
 
@@ -155,6 +169,7 @@ impl Network {
             Network::Mainnet => GenesisValues::mainnet(),
             Network::Preprod => GenesisValues::preprod(),
             Network::Preview => GenesisValues::preview(),
+            Network::Devnet => GenesisValues::testnet(),
         }
     }
 
@@ -221,6 +236,7 @@ impl From<Network> for u64 {
             Network::Mainnet => MAINNET_MAGIC,
             Network::Preprod => PRE_PRODUCTION_MAGIC,
             Network::Preview => PREVIEW_MAGIC,
+            Network::Devnet => TESTNET_MAGIC,
         }
     }
 }
@@ -229,7 +245,7 @@ impl From<Network> for PallasNetwork {
     fn from(value: Network) -> Self {
         match value {
             Network::Mainnet => PallasNetwork::Mainnet,
-            Network::Preprod | Network::Preview => PallasNetwork::Testnet,
+            Network::Preprod | Network::Preview | Network::Devnet => PallasNetwork::Testnet,
         }
     }
 }
diff --git a/rust/cardano-chain-follower/Cargo.toml b/rust/cardano-chain-follower/Cargo.toml
index d12aca07ae..5d64289e50 100644
--- a/rust/cardano-chain-follower/Cargo.toml
+++ b/rust/cardano-chain-follower/Cargo.toml
@@ -11,17 +11,17 @@ license.workspace = true
 workspace = true
 
 [dependencies]
-pallas = { version = "0.33.0" }
-pallas-hardano = { version = "0.33.0" }
-pallas-crypto = { version = "0.33.0" }
+pallas = {version = "0.33.0",  git = "https://github.com/input-output-hk/catalyst-pallas.git", branch = "test/testnet-genesis-values" }
+pallas-hardano = {version = "0.33.0",  git = "https://github.com/input-output-hk/catalyst-pallas.git", branch = "test/testnet-genesis-values" }
+pallas-crypto = {version = "0.33.0",  git = "https://github.com/input-output-hk/catalyst-pallas.git", branch = "test/testnet-genesis-values" }
 
 mithril-client = { version = "0.12.2", default-features = false, features = [
     "full",
     "num-integer-backend",
 ] }
 
-cardano-blockchain-types = { version = "0.0.5",  git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "cardano-blockchain-types-v0.0.5" }
-catalyst-types = { version = "0.0.5",  git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "catalyst-types-v0.0.5" }
+cardano-blockchain-types = { version = "0.0.5",  git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
+catalyst-types = { version = "0.0.5",  git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network"}
 
 
 thiserror = "1.0.69"
@@ -65,7 +65,7 @@ test-log = { version = "0.2.16", default-features = false, features = [
     "trace",
 ] }
 clap = "4.5.23"
-rbac-registration = { version = "0.0.6", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "rbac-registration-v0.0.6" }
+rbac-registration = { version = "0.0.6", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
 minicbor = { version = "2.0.0", features = ["alloc","half"]}
 
 # Note, these features are for support of features exposed by dependencies.
diff --git a/rust/cardano-chain-follower/src/turbo_downloader/mod.rs b/rust/cardano-chain-follower/src/turbo_downloader/mod.rs
index 7ab5b64e4f..446bf01355 100644
--- a/rust/cardano-chain-follower/src/turbo_downloader/mod.rs
+++ b/rust/cardano-chain-follower/src/turbo_downloader/mod.rs
@@ -216,7 +216,7 @@ impl DlConfig {
         resolver.resolve(url, worker)
     }
 
-    /// Builds a `UReq` Agent.  
+    /// Builds a `UReq` Agent.
     ///
     /// Because we need multiple clients to prevent all traffic being forced onto a single
     /// connection when HTTP2 is used, the client can NOT be supplied by the user.
@@ -359,8 +359,8 @@ impl ParallelDownloadProcessorInner {
             .set(RANGE.as_str(), &range_header)
             .call()
             .context("GET ranged request failed")?;
-        // let addr = get_range_response.remote_addr();
-        // debug!("Chunk {chunk} from {addr:?}");
+         let addr = get_range_response.remote_addr();
+         debug!("Chunk {chunk} from {addr:?}");
         if get_range_response.status() != StatusCode::PARTIAL_CONTENT {
             bail!(
                 "Response to range request has an unexpected status code (expected {}, found {})",
diff --git a/rust/catalyst-types/Cargo.toml b/rust/catalyst-types/Cargo.toml
index f89c1b6c38..1d262cff92 100644
--- a/rust/catalyst-types/Cargo.toml
+++ b/rust/catalyst-types/Cargo.toml
@@ -24,7 +24,7 @@ hex = "0.4.3"
 minicbor = { version = "0.25.1", features = ["std"] }
 num-traits = "0.2.19"
 orx-concurrent-vec = { version = "3.6.0", features = ["serde"] }
-pallas-crypto = { version = "0.33.0" }
+pallas-crypto = { version = "0.33.0", git = "https://github.com/input-output-hk/catalyst-pallas.git", branch = "test/testnet-genesis-values" }
 serde = { version = "1.0.217", features = ["derive", "rc"] }
 thiserror = "2.0.11"
 base64-url = "3.0.0"
diff --git a/rust/rbac-registration/Cargo.toml b/rust/rbac-registration/Cargo.toml
index 997abf66fd..2e1c69e116 100644
--- a/rust/rbac-registration/Cargo.toml
+++ b/rust/rbac-registration/Cargo.toml
@@ -32,8 +32,8 @@ uuid = "1.11.0"
 oid-registry = "0.7.1"
 thiserror = "2.0.11"
 
-c509-certificate = { version = "0.0.3", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "c509-certificate-v0.0.3" }
-pallas = { version = "0.33.0" }
-cbork-utils = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "cbork-utils-v0.0.2" }
-cardano-blockchain-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "cardano-blockchain-types-v0.0.5" }
-catalyst-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "catalyst-types-v0.0.5" }
+c509-certificate = { version = "0.0.3", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
+pallas = { version = "0.33.0", git = "https://github.com/input-output-hk/catalyst-pallas.git", branch = "test/testnet-genesis-values" }
+cbork-utils = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
+cardano-blockchain-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
+catalyst-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
diff --git a/rust/signed_doc/Cargo.toml b/rust/signed_doc/Cargo.toml
index 25fb35586c..ac930eeeb2 100644
--- a/rust/signed_doc/Cargo.toml
+++ b/rust/signed_doc/Cargo.toml
@@ -11,8 +11,8 @@ license.workspace = true
 workspace = true
 
 [dependencies]
-catalyst-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "catalyst-types-v0.0.5" }
-cbork-utils = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "cbork-utils-v0.0.2" }
+catalyst-types = { version = "0.0.5", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network"}
+cbork-utils = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", branch = "test/adds-custom-network" }
 
 anyhow = "1.0.95"
 serde = { version = "1.0.217", features = ["derive"] }