diff --git a/zebra-chain/src/addresses/sapling.rs b/zebra-chain/src/addresses/sapling.rs
index f6e9e0ae7..08a393e73 100644
--- a/zebra-chain/src/addresses/sapling.rs
+++ b/zebra-chain/src/addresses/sapling.rs
@@ -12,8 +12,8 @@ use proptest::prelude::*;
 
 use crate::{
     keys::sapling,
+    parameters::Network,
     serialization::{ReadZcashExt, SerializationError},
-    Network,
 };
 
 /// Human-Readable Parts for input to bech32 encoding.
diff --git a/zebra-chain/src/addresses/sprout.rs b/zebra-chain/src/addresses/sprout.rs
index 625820254..862189987 100644
--- a/zebra-chain/src/addresses/sprout.rs
+++ b/zebra-chain/src/addresses/sprout.rs
@@ -7,8 +7,8 @@ use proptest::{arbitrary::Arbitrary, array, prelude::*};
 
 use crate::{
     keys::sprout,
+    parameters::Network,
     serialization::{ReadZcashExt, SerializationError, ZcashDeserialize, ZcashSerialize},
-    Network,
 };
 
 /// Magic numbers used to identify what networks Sprout Shielded
diff --git a/zebra-chain/src/addresses/transparent.rs b/zebra-chain/src/addresses/transparent.rs
index 53cc6a451..f6e227209 100644
--- a/zebra-chain/src/addresses/transparent.rs
+++ b/zebra-chain/src/addresses/transparent.rs
@@ -10,9 +10,9 @@ use sha2::Sha256;
 use proptest::{arbitrary::Arbitrary, collection::vec, prelude::*};
 
 use crate::{
+    parameters::Network,
     serialization::{SerializationError, ZcashDeserialize, ZcashSerialize},
     types::Script,
-    Network,
 };
 
 /// Magic numbers used to identify what networks Transparent Addresses
diff --git a/zebra-chain/src/block.rs b/zebra-chain/src/block.rs
index 88887150e..2461f6f5c 100644
--- a/zebra-chain/src/block.rs
+++ b/zebra-chain/src/block.rs
@@ -16,8 +16,8 @@ use std::{error, sync::Arc};
 #[cfg(test)]
 use proptest_derive::Arbitrary;
 
+use crate::parameters::Network;
 use crate::transaction::Transaction;
-use crate::Network;
 
 pub use hash::BlockHeaderHash;
 pub use header::BlockHeader;
diff --git a/zebra-chain/src/block/light_client.rs b/zebra-chain/src/block/light_client.rs
index 3f0ad1823..73f143546 100644
--- a/zebra-chain/src/block/light_client.rs
+++ b/zebra-chain/src/block/light_client.rs
@@ -1,7 +1,7 @@
 //! The LightClientRootHash enum, used for the corresponding block header field.
 
+use crate::parameters::{Network, NetworkUpgrade, NetworkUpgrade::*};
 use crate::treestate::note_commitment_tree::SaplingNoteTreeRootHash;
-use crate::{Network, NetworkUpgrade, NetworkUpgrade::*};
 
 use super::BlockHeight;
 
diff --git a/zebra-chain/src/block/tests/arbitrary.rs b/zebra-chain/src/block/tests/arbitrary.rs
index c3affcd75..992355e7e 100644
--- a/zebra-chain/src/block/tests/arbitrary.rs
+++ b/zebra-chain/src/block/tests/arbitrary.rs
@@ -1,6 +1,6 @@
 use crate::merkle_tree::MerkleTreeRootHash;
+use crate::parameters::Network;
 use crate::work::{difficulty::CompactDifficulty, equihash};
-use crate::Network;
 
 use super::super::*;
 
diff --git a/zebra-chain/src/block/tests/prop.rs b/zebra-chain/src/block/tests/prop.rs
index bcfeb1de6..016af73e5 100644
--- a/zebra-chain/src/block/tests/prop.rs
+++ b/zebra-chain/src/block/tests/prop.rs
@@ -3,8 +3,8 @@ use std::io::ErrorKind;
 
 use proptest::{arbitrary::any, prelude::*, test_runner::Config};
 
+use crate::parameters::Network;
 use crate::serialization::{SerializationError, ZcashDeserializeInto, ZcashSerialize};
-use crate::Network;
 
 use super::super::*;
 
diff --git a/zebra-chain/src/keys/sapling.rs b/zebra-chain/src/keys/sapling.rs
index b79590e05..7c12c8a9b 100644
--- a/zebra-chain/src/keys/sapling.rs
+++ b/zebra-chain/src/keys/sapling.rs
@@ -30,11 +30,11 @@ use rand_core::{CryptoRng, RngCore};
 use proptest_derive::Arbitrary;
 
 use crate::{
+    parameters::Network,
     redjubjub::{self, SpendAuth},
     serialization::{
         serde_helpers, ReadZcashExt, SerializationError, ZcashDeserialize, ZcashSerialize,
     },
-    Network,
 };
 
 /// The [Randomness Beacon][1] ("URS").
diff --git a/zebra-chain/src/keys/sprout.rs b/zebra-chain/src/keys/sprout.rs
index 75cefd619..033f9778e 100644
--- a/zebra-chain/src/keys/sprout.rs
+++ b/zebra-chain/src/keys/sprout.rs
@@ -18,8 +18,8 @@ use proptest::{array, prelude::*};
 use proptest_derive::Arbitrary;
 
 use crate::{
+    parameters::Network,
     serialization::{ReadZcashExt, SerializationError, ZcashDeserialize, ZcashSerialize},
-    Network,
 };
 
 /// Magic numbers used to identify with what networks Sprout Spending
diff --git a/zebra-chain/src/lib.rs b/zebra-chain/src/lib.rs
index ef63d21de..0e678995c 100644
--- a/zebra-chain/src/lib.rs
+++ b/zebra-chain/src/lib.rs
@@ -29,24 +29,3 @@ pub mod work;
 
 pub use ed25519_zebra;
 pub use redjubjub;
-
-pub use parameters::NetworkUpgrade;
-
-#[cfg(test)]
-use proptest_derive::Arbitrary;
-
-/// An enum describing the possible network choices.
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Serialize, Deserialize)]
-#[cfg_attr(test, derive(Arbitrary))]
-pub enum Network {
-    /// The production mainnet.
-    Mainnet,
-    /// The testnet.
-    Testnet,
-}
-
-impl Default for Network {
-    fn default() -> Self {
-        Network::Mainnet
-    }
-}
diff --git a/zebra-chain/src/parameters.rs b/zebra-chain/src/parameters.rs
index 4b3a13a60..9c614fbca 100644
--- a/zebra-chain/src/parameters.rs
+++ b/zebra-chain/src/parameters.rs
@@ -12,8 +12,10 @@
 //! Typically, consensus parameters are accessed via a function that takes a
 //! `Network` and `BlockHeight`.
 
-pub mod network_upgrade;
+mod network;
+mod network_upgrade;
 
+pub use network::Network;
 pub use network_upgrade::*;
 
 #[cfg(test)]
diff --git a/zebra-chain/src/parameters/network.rs b/zebra-chain/src/parameters/network.rs
new file mode 100644
index 000000000..a1220d902
--- /dev/null
+++ b/zebra-chain/src/parameters/network.rs
@@ -0,0 +1,18 @@
+#[cfg(test)]
+use proptest_derive::Arbitrary;
+
+/// An enum describing the possible network choices.
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Serialize, Deserialize)]
+#[cfg_attr(test, derive(Arbitrary))]
+pub enum Network {
+    /// The production mainnet.
+    Mainnet,
+    /// The testnet.
+    Testnet,
+}
+
+impl Default for Network {
+    fn default() -> Self {
+        Network::Mainnet
+    }
+}
diff --git a/zebra-chain/src/parameters/network_upgrade.rs b/zebra-chain/src/parameters/network_upgrade.rs
index 828bfcd57..2b43b491d 100644
--- a/zebra-chain/src/parameters/network_upgrade.rs
+++ b/zebra-chain/src/parameters/network_upgrade.rs
@@ -3,7 +3,7 @@
 use NetworkUpgrade::*;
 
 use crate::block::BlockHeight;
-use crate::{Network, Network::*};
+use crate::parameters::{Network, Network::*};
 
 use std::collections::{BTreeMap, HashMap};
 use std::ops::Bound::*;
diff --git a/zebra-chain/src/parameters/tests.rs b/zebra-chain/src/parameters/tests.rs
index 02196ffc1..d3c2cd078 100644
--- a/zebra-chain/src/parameters/tests.rs
+++ b/zebra-chain/src/parameters/tests.rs
@@ -1,12 +1,13 @@
 //! Consensus parameter tests for Zebra.
 
-use super::*;
-use NetworkUpgrade::*;
+use std::collections::HashSet;
 
 use crate::block::BlockHeight;
-use crate::{Network, Network::*};
 
-use std::collections::HashSet;
+use super::*;
+
+use Network::*;
+use NetworkUpgrade::*;
 
 /// Check that the activation heights and network upgrades are unique.
 #[test]
diff --git a/zebra-consensus/src/chain.rs b/zebra-consensus/src/chain.rs
index 7a594852a..dc55dacdb 100644
--- a/zebra-consensus/src/chain.rs
+++ b/zebra-consensus/src/chain.rs
@@ -29,7 +29,7 @@ use tracing_futures::Instrument;
 
 use zebra_chain::block::BlockHeight;
 use zebra_chain::block::{Block, BlockHeaderHash};
-use zebra_chain::{Network, NetworkUpgrade::Sapling};
+use zebra_chain::parameters::{Network, NetworkUpgrade::Sapling};
 
 /// The maximum expected gap between blocks.
 ///
diff --git a/zebra-consensus/src/chain/tests.rs b/zebra-consensus/src/chain/tests.rs
index bef582a83..1d02aa9fe 100644
--- a/zebra-consensus/src/chain/tests.rs
+++ b/zebra-consensus/src/chain/tests.rs
@@ -1,23 +1,26 @@
 //! Tests for chain verification
 
-use super::*;
-
-use crate::checkpoint::CheckpointList;
+use std::{collections::BTreeMap, mem::drop, sync::Arc, time::Duration};
 
 use color_eyre::eyre::eyre;
 use color_eyre::eyre::Report;
 use futures::{future::TryFutureExt, stream::FuturesUnordered};
 use once_cell::sync::Lazy;
-use std::{collections::BTreeMap, mem::drop, sync::Arc, time::Duration};
 use tokio::{stream::StreamExt, time::timeout};
 use tower::{layer::Layer, timeout::TimeoutLayer, Service, ServiceExt};
 use tracing_futures::Instrument;
 
-use zebra_chain::block::{Block, BlockHeader};
-use zebra_chain::serialization::ZcashDeserialize;
-use zebra_chain::Network::{self, *};
+use zebra_chain::{
+    block::{Block, BlockHeader},
+    parameters::Network,
+    serialization::ZcashDeserialize,
+};
 use zebra_test::transcript::{TransError, Transcript};
 
+use crate::checkpoint::CheckpointList;
+
+use super::*;
+
 /// The timeout we apply to each verify future during testing.
 ///
 /// The checkpoint verifier uses `tokio::sync::oneshot` channels as futures.
@@ -213,7 +216,7 @@ async fn verify_block() -> Result<(), Report> {
         checkpoint_data.iter().cloned().collect();
     let checkpoint_list = CheckpointList::from_list(checkpoint_list).map_err(|e| eyre!(e))?;
 
-    let (chain_verifier, _) = verifiers_from_checkpoint_list(Mainnet, checkpoint_list);
+    let (chain_verifier, _) = verifiers_from_checkpoint_list(Network::Mainnet, checkpoint_list);
 
     let transcript = Transcript::from(BLOCK_VERIFY_TRANSCRIPT_GENESIS_TO_BLOCK_1.iter().cloned());
     transcript.check(chain_verifier).await.unwrap();
@@ -235,7 +238,7 @@ async fn verify_checkpoint() -> Result<(), Report> {
 
     // Test that the chain::init function works. Most of the other tests use
     // init_from_verifiers.
-    let chain_verifier = super::init(Mainnet, zebra_state::in_memory::init()).await;
+    let chain_verifier = super::init(Network::Mainnet, zebra_state::in_memory::init()).await;
 
     // Add a timeout layer
     let chain_verifier =
@@ -260,7 +263,7 @@ async fn verify_fail_no_coinbase_test() -> Result<(), Report> {
 async fn verify_fail_no_coinbase() -> Result<(), Report> {
     zebra_test::init();
 
-    let (chain_verifier, state_service) = verifiers_from_network(Mainnet);
+    let (chain_verifier, state_service) = verifiers_from_network(Network::Mainnet);
 
     // Add a timeout layer
     let chain_verifier =
@@ -285,7 +288,7 @@ async fn round_trip_checkpoint_test() -> Result<(), Report> {
 async fn round_trip_checkpoint() -> Result<(), Report> {
     zebra_test::init();
 
-    let (chain_verifier, state_service) = verifiers_from_network(Mainnet);
+    let (chain_verifier, state_service) = verifiers_from_network(Network::Mainnet);
 
     // Add a timeout layer
     let chain_verifier =
@@ -310,7 +313,7 @@ async fn verify_fail_add_block_checkpoint_test() -> Result<(), Report> {
 async fn verify_fail_add_block_checkpoint() -> Result<(), Report> {
     zebra_test::init();
 
-    let (chain_verifier, state_service) = verifiers_from_network(Mainnet);
+    let (chain_verifier, state_service) = verifiers_from_network(Network::Mainnet);
 
     // Add a timeout layer
     let chain_verifier =
@@ -409,7 +412,7 @@ async fn continuous_blockchain(restart_height: Option<BlockHeight>) -> Result<()
 
     let block_verifier = crate::block::init(state_service.clone());
     let mut chain_verifier = super::init_from_verifiers(
-        Mainnet,
+        Network::Mainnet,
         block_verifier,
         Some(checkpoint_list),
         state_service.clone(),
diff --git a/zebra-consensus/src/checkpoint.rs b/zebra-consensus/src/checkpoint.rs
index 331a109c2..c847416a2 100644
--- a/zebra-consensus/src/checkpoint.rs
+++ b/zebra-consensus/src/checkpoint.rs
@@ -38,9 +38,10 @@ use std::{
 use tokio::sync::oneshot;
 use tower::Service;
 
-use zebra_chain::block::BlockHeight;
-use zebra_chain::block::{Block, BlockHeaderHash};
-use zebra_chain::Network;
+use zebra_chain::{
+    block::{Block, BlockHeaderHash, BlockHeight},
+    parameters::Network,
+};
 
 /// The inner error type for CheckpointVerifier.
 // TODO(jlusby): Error = Report ?
diff --git a/zebra-consensus/src/checkpoint/list.rs b/zebra-consensus/src/checkpoint/list.rs
index 8e3e5fced..531d19bc8 100644
--- a/zebra-consensus/src/checkpoint/list.rs
+++ b/zebra-consensus/src/checkpoint/list.rs
@@ -19,7 +19,7 @@ use std::{
 
 use zebra_chain::block::BlockHeaderHash;
 use zebra_chain::block::BlockHeight;
-use zebra_chain::Network::{self, *};
+use zebra_chain::parameters::Network;
 
 const MAINNET_CHECKPOINTS: &str = include_str!("main-checkpoints.txt");
 const TESTNET_CHECKPOINTS: &str = include_str!("test-checkpoints.txt");
@@ -70,10 +70,10 @@ impl CheckpointList {
     pub fn new(network: Network) -> Self {
         // parse calls CheckpointList::from_list
         let checkpoint_list: CheckpointList = match network {
-            Mainnet => MAINNET_CHECKPOINTS
+            Network::Mainnet => MAINNET_CHECKPOINTS
                 .parse()
                 .expect("Hard-coded Mainnet checkpoint list parses and validates"),
-            Testnet => TESTNET_CHECKPOINTS
+            Network::Testnet => TESTNET_CHECKPOINTS
                 .parse()
                 .expect("Hard-coded Testnet checkpoint list parses and validates"),
         };
@@ -108,8 +108,8 @@ impl CheckpointList {
         // Check that the list starts with the correct genesis block
         match checkpoints.iter().next() {
             Some((BlockHeight(0), hash))
-                if (hash == &parameters::genesis_hash(Mainnet)
-                    || hash == &parameters::genesis_hash(Testnet)) => {}
+                if (hash == &parameters::genesis_hash(Network::Mainnet)
+                    || hash == &parameters::genesis_hash(Network::Testnet)) => {}
             Some((BlockHeight(0), _)) => {
                 Err("the genesis checkpoint does not match the Mainnet or Testnet genesis hash")?
             }
diff --git a/zebra-consensus/src/checkpoint/list/tests.rs b/zebra-consensus/src/checkpoint/list/tests.rs
index 72104d7c0..4ed6aa6b3 100644
--- a/zebra-consensus/src/checkpoint/list/tests.rs
+++ b/zebra-consensus/src/checkpoint/list/tests.rs
@@ -4,8 +4,8 @@ use super::*;
 
 use std::sync::Arc;
 
+use zebra_chain::parameters::{Network, NetworkUpgrade::Sapling};
 use zebra_chain::{block::Block, serialization::ZcashDeserialize};
-use zebra_chain::{Network, NetworkUpgrade::Sapling};
 
 /// Make a checkpoint list containing only the genesis block
 #[test]
@@ -231,20 +231,20 @@ fn checkpoint_list_load_hard_coded() -> Result<(), Error> {
         .parse()
         .expect("hard-coded Testnet checkpoint list should parse");
 
-    let _ = CheckpointList::new(Mainnet);
-    let _ = CheckpointList::new(Testnet);
+    let _ = CheckpointList::new(Network::Mainnet);
+    let _ = CheckpointList::new(Network::Testnet);
 
     Ok(())
 }
 
 #[test]
 fn checkpoint_list_hard_coded_sapling_mainnet() -> Result<(), Error> {
-    checkpoint_list_hard_coded_sapling(Mainnet)
+    checkpoint_list_hard_coded_sapling(Network::Mainnet)
 }
 
 #[test]
 fn checkpoint_list_hard_coded_sapling_testnet() -> Result<(), Error> {
-    checkpoint_list_hard_coded_sapling(Testnet)
+    checkpoint_list_hard_coded_sapling(Network::Testnet)
 }
 
 /// Check that the hard-coded lists cover the Sapling network upgrade
diff --git a/zebra-consensus/src/parameters/genesis.rs b/zebra-consensus/src/parameters/genesis.rs
index e3023d3fe..8be7c8910 100644
--- a/zebra-consensus/src/parameters/genesis.rs
+++ b/zebra-consensus/src/parameters/genesis.rs
@@ -1,7 +1,6 @@
 //! Genesis consensus parameters for each Zcash network.
 
-use zebra_chain::block::BlockHeaderHash;
-use zebra_chain::{Network, Network::*};
+use zebra_chain::{block::BlockHeaderHash, parameters::Network};
 
 /// The previous block hash for the genesis block.
 ///
@@ -13,9 +12,9 @@ pub const GENESIS_PREVIOUS_BLOCK_HASH: BlockHeaderHash = BlockHeaderHash([0; 32]
 pub fn genesis_hash(network: Network) -> BlockHeaderHash {
     match network {
         // zcash-cli getblockhash 0 | zebrad revhex
-        Mainnet => "08ce3d9731b000c08338455c8a4a6bd05da16e26b11daa1b917184ece80f0400",
+        Network::Mainnet => "08ce3d9731b000c08338455c8a4a6bd05da16e26b11daa1b917184ece80f0400",
         // zcash-cli -testnet getblockhash 0 | zebrad revhex
-        Testnet => "382c4a332661c7ed0671f32a34d724619f086c61873bce7c99859dd9920aa605",
+        Network::Testnet => "382c4a332661c7ed0671f32a34d724619f086c61873bce7c99859dd9920aa605",
     }
     .parse()
     .expect("hard-coded hash parses")
diff --git a/zebra-consensus/src/parameters/minimum_difficulty.rs b/zebra-consensus/src/parameters/minimum_difficulty.rs
index 21edb7682..15b07dd93 100644
--- a/zebra-consensus/src/parameters/minimum_difficulty.rs
+++ b/zebra-consensus/src/parameters/minimum_difficulty.rs
@@ -1,7 +1,6 @@
 //! The minimum difficulty block rule for Zcash.
 
-use zebra_chain::block::BlockHeight;
-use zebra_chain::{Network, Network::*};
+use zebra_chain::{block::BlockHeight, parameters::Network};
 
 /// The testnet block height when minimum difficulty blocks start being
 /// accepted.
@@ -29,6 +28,7 @@ impl MinimumDifficulty {
     /// Returns the current minimum difficulty rule for `network` and `height`.
     pub fn current(network: Network, height: BlockHeight) -> MinimumDifficulty {
         use MinimumDifficulty::*;
+        use Network::*;
 
         match network {
             Mainnet => Rejected,
diff --git a/zebra-consensus/src/parameters/tests.rs b/zebra-consensus/src/parameters/tests.rs
index 9e9dcc465..6d9aa0b46 100644
--- a/zebra-consensus/src/parameters/tests.rs
+++ b/zebra-consensus/src/parameters/tests.rs
@@ -2,8 +2,10 @@
 
 use super::*;
 
-use zebra_chain::block::BlockHeight;
-use zebra_chain::{Network, Network::*};
+use zebra_chain::{
+    block::BlockHeight,
+    parameters::Network::{self, *},
+};
 
 #[test]
 fn minimum_difficulty_mainnet() {
diff --git a/zebra-network/src/config.rs b/zebra-network/src/config.rs
index 8687193a2..30ef5b989 100644
--- a/zebra-network/src/config.rs
+++ b/zebra-network/src/config.rs
@@ -5,7 +5,7 @@ use std::{
     time::Duration,
 };
 
-use zebra_chain::Network;
+use zebra_chain::parameters::Network;
 
 /// Configuration for networking code.
 #[derive(Clone, Debug, Deserialize, Serialize)]
diff --git a/zebra-network/src/constants.rs b/zebra-network/src/constants.rs
index 59cdf6bde..4afd9275e 100644
--- a/zebra-network/src/constants.rs
+++ b/zebra-network/src/constants.rs
@@ -5,7 +5,7 @@ use std::time::Duration;
 // XXX should these constants be split into protocol also?
 use crate::protocol::external::types::*;
 
-use zebra_chain::NetworkUpgrade::{self, *};
+use zebra_chain::parameters::NetworkUpgrade;
 
 /// The buffer size for the peer set.
 pub const PEERSET_BUFFER_SIZE: usize = 10;
@@ -63,7 +63,7 @@ pub const CURRENT_VERSION: Version = Version(170_012);
 //
 // TODO: replace with NetworkUpgrade::current(network, height).
 //       See the detailed comment in handshake.rs, where this constant is used.
-pub const MIN_NETWORK_UPGRADE: NetworkUpgrade = Heartwood;
+pub const MIN_NETWORK_UPGRADE: NetworkUpgrade = NetworkUpgrade::Heartwood;
 
 /// The default RTT estimate for peer responses.
 pub const EWMA_DEFAULT_RTT: Duration = Duration::from_secs(1);
diff --git a/zebra-network/src/peer_set/initialize.rs b/zebra-network/src/peer_set/initialize.rs
index ac95f35d9..908c8a2c2 100644
--- a/zebra-network/src/peer_set/initialize.rs
+++ b/zebra-network/src/peer_set/initialize.rs
@@ -29,7 +29,7 @@ use crate::{
     Request, Response,
 };
 
-use zebra_chain::Network::*;
+use zebra_chain::parameters::Network;
 
 use super::CandidateSet;
 use super::PeerSet;
@@ -102,8 +102,8 @@ where
     // TODO: use the right port if the port is unspecified
     //       split the address and port configs?
     let (wrong_net, wrong_net_port) = match config.network {
-        Mainnet => (Testnet, 18233),
-        Testnet => (Mainnet, 8233),
+        Network::Mainnet => (Network::Testnet, 18233),
+        Network::Testnet => (Network::Mainnet, 8233),
     };
     if config.listen_addr.port() == wrong_net_port {
         warn!(
diff --git a/zebra-network/src/protocol/external/codec.rs b/zebra-network/src/protocol/external/codec.rs
index 6e8582b07..f07bbd065 100644
--- a/zebra-network/src/protocol/external/codec.rs
+++ b/zebra-network/src/protocol/external/codec.rs
@@ -11,12 +11,12 @@ use tokio_util::codec::{Decoder, Encoder};
 use zebra_chain::{
     block::BlockHeight,
     block::{Block, BlockHeaderHash},
+    parameters::Network,
     serialization::{
         sha256d, ReadZcashExt, SerializationError as Error, WriteZcashExt, ZcashDeserialize,
         ZcashSerialize,
     },
     transaction::Transaction,
-    Network,
 };
 
 use crate::constants;
diff --git a/zebra-network/src/protocol/external/types.rs b/zebra-network/src/protocol/external/types.rs
index 6802bc0dc..46bbecaf3 100644
--- a/zebra-network/src/protocol/external/types.rs
+++ b/zebra-network/src/protocol/external/types.rs
@@ -4,9 +4,13 @@ use crate::constants::magics;
 
 use std::fmt;
 
-use zebra_chain::block::BlockHeight;
-use zebra_chain::Network::{self, *};
-use zebra_chain::NetworkUpgrade::{self, *};
+use zebra_chain::{
+    block::BlockHeight,
+    parameters::{
+        Network::{self, *},
+        NetworkUpgrade::{self, *},
+    },
+};
 
 #[cfg(test)]
 use proptest_derive::Arbitrary;
diff --git a/zebra-state/src/lib.rs b/zebra-state/src/lib.rs
index ffeefd058..6f1db51fb 100644
--- a/zebra-state/src/lib.rs
+++ b/zebra-state/src/lib.rs
@@ -24,8 +24,7 @@ use tower::{Service, ServiceExt};
 use zebra_chain::{
     block::BlockHeight,
     block::{Block, BlockHeaderHash},
-    Network,
-    Network::*,
+    parameters::Network,
 };
 
 pub mod in_memory;
@@ -78,8 +77,8 @@ impl Config {
     /// provided `zebra_state::Config`.
     pub(crate) fn sled_config(&self, network: Network) -> sled::Config {
         let net_dir = match network {
-            Mainnet => "mainnet",
-            Testnet => "testnet",
+            Network::Mainnet => "mainnet",
+            Network::Testnet => "testnet",
         };
         let path = self.cache_dir.join(net_dir).join("state");
 
@@ -238,12 +237,12 @@ mod tests {
 
     #[test]
     fn test_path_mainnet() {
-        test_path(Mainnet);
+        test_path(Network::Mainnet);
     }
 
     #[test]
     fn test_path_testnet() {
-        test_path(Testnet);
+        test_path(Network::Testnet);
     }
 
     /// Check the sled path for `network`.
@@ -258,8 +257,8 @@ mod tests {
         assert_eq!(path.file_name(), Some(OsStr::new("state")));
         assert!(path.pop());
         match network {
-            Mainnet => assert_eq!(path.file_name(), Some(OsStr::new("mainnet"))),
-            Testnet => assert_eq!(path.file_name(), Some(OsStr::new("testnet"))),
+            Network::Mainnet => assert_eq!(path.file_name(), Some(OsStr::new("mainnet"))),
+            Network::Testnet => assert_eq!(path.file_name(), Some(OsStr::new("testnet"))),
         }
     }
 
diff --git a/zebra-state/src/on_disk.rs b/zebra-state/src/on_disk.rs
index dba523962..2ee5e180e 100644
--- a/zebra-state/src/on_disk.rs
+++ b/zebra-state/src/on_disk.rs
@@ -15,7 +15,7 @@ use zebra_chain::serialization::{SerializationError, ZcashDeserialize, ZcashSeri
 use zebra_chain::{
     block::BlockHeight,
     block::{Block, BlockHeaderHash},
-    Network,
+    parameters::Network,
 };
 
 /// Type alias of our wrapped service
diff --git a/zebra-state/tests/basic.rs b/zebra-state/tests/basic.rs
index 95334f7c6..805c00328 100644
--- a/zebra-state/tests/basic.rs
+++ b/zebra-state/tests/basic.rs
@@ -2,7 +2,7 @@ use color_eyre::eyre::Report;
 use once_cell::sync::Lazy;
 use std::sync::Arc;
 use tempdir::TempDir;
-use zebra_chain::{block::Block, serialization::ZcashDeserialize, Network, Network::*};
+use zebra_chain::{block::Block, parameters::Network, serialization::ZcashDeserialize};
 use zebra_test::transcript::{TransError, Transcript};
 
 use zebra_state::*;
@@ -97,12 +97,12 @@ static GET_TIP_TRANSCRIPT_TESTNET: Lazy<Vec<(Request, Result<Response, TransErro
 
 #[tokio::test]
 async fn check_transcripts_mainnet() -> Result<(), Report> {
-    check_transcripts(Mainnet).await
+    check_transcripts(Network::Mainnet).await
 }
 
 #[tokio::test]
 async fn check_transcripts_testnet() -> Result<(), Report> {
-    check_transcripts(Testnet).await
+    check_transcripts(Network::Testnet).await
 }
 
 #[spandoc::spandoc]
diff --git a/zebrad/src/commands/start/sync.rs b/zebrad/src/commands/start/sync.rs
index 8b5fab039..243387194 100644
--- a/zebrad/src/commands/start/sync.rs
+++ b/zebrad/src/commands/start/sync.rs
@@ -9,7 +9,7 @@ use tracing_futures::Instrument;
 
 use zebra_chain::{
     block::{Block, BlockHeaderHash},
-    Network,
+    parameters::Network,
 };
 use zebra_consensus::checkpoint;
 use zebra_consensus::parameters;