diff --git a/src/lean_spec/__main__.py b/src/lean_spec/__main__.py
index f2ce47d2b..57577cc9b 100644
--- a/src/lean_spec/__main__.py
+++ b/src/lean_spec/__main__.py
@@ -504,7 +504,7 @@ async def run_node(
     # Set the network name for incoming message validation.
     #
     # Without this, the event source defaults to "0x00000000" and rejects
-    # all messages from other clients that use "devnet0".
+    # all messages from other clients that use "12345678".
     event_source.set_network_name(fork.GOSSIP_DIGEST)
 
     # Subscribe to gossip topics.
diff --git a/src/lean_spec/forks/lstar/spec.py b/src/lean_spec/forks/lstar/spec.py
index 9177cc3c1..c5b845b76 100644
--- a/src/lean_spec/forks/lstar/spec.py
+++ b/src/lean_spec/forks/lstar/spec.py
@@ -14,7 +14,7 @@ class LstarSpec(ForkProtocol):
 
     NAME: ClassVar[str] = "lstar"
     VERSION: ClassVar[int] = 4
-    GOSSIP_DIGEST: ClassVar[str] = "devnet0"
+    GOSSIP_DIGEST: ClassVar[str] = "12345678"
 
     previous: ClassVar[type[ForkProtocol] | None] = None
 
diff --git a/src/lean_spec/subspecs/node/node.py b/src/lean_spec/subspecs/node/node.py
index ff184f13c..450e420a4 100644
--- a/src/lean_spec/subspecs/node/node.py
+++ b/src/lean_spec/subspecs/node/node.py
@@ -105,7 +105,7 @@ class NodeConfig:
     """
     Network name for gossip topics.
 
-    For devnet testing with ream, use "devnet0".
+    For devnet testing with ream, use "12345678".
     """
 
     is_aggregator: bool = field(default=False)
diff --git a/tests/interop/helpers/node_runner.py b/tests/interop/helpers/node_runner.py
index 84ad6a686..73c968a99 100644
--- a/tests/interop/helpers/node_runner.py
+++ b/tests/interop/helpers/node_runner.py
@@ -199,7 +199,7 @@ class NodeCluster:
     _genesis_time: int = field(default=0, repr=False)
     """Genesis time for all nodes."""
 
-    network_name: str = field(default="devnet0")
+    network_name: str = field(default="12345678")
     """Network name for gossip topics."""
 
     def __post_init__(self) -> None:
diff --git a/tests/lean_spec/forks/test_fork_protocol.py b/tests/lean_spec/forks/test_fork_protocol.py
index 8d5038935..27b776c50 100644
--- a/tests/lean_spec/forks/test_fork_protocol.py
+++ b/tests/lean_spec/forks/test_fork_protocol.py
@@ -60,7 +60,7 @@ def test_identity(self) -> None:
 
     def test_gossip_digest(self) -> None:
         """LstarSpec carries the gossipsub fork digest as fork metadata."""
-        assert LstarSpec.GOSSIP_DIGEST == "devnet0"
+        assert LstarSpec.GOSSIP_DIGEST == "12345678"
 
     def test_previous_is_none(self) -> None:
         """LstarSpec is the root of the upgrade chain."""