diff --git a/changelog.d/1543.fixed.md b/changelog.d/1543.fixed.md
new file mode 100644
index 00000000..ab3b1625
--- /dev/null
+++ b/changelog.d/1543.fixed.md
@@ -0,0 +1 @@
+Fixed Modal gateway imports so routing metadata does not pull worker-only dependencies into the lightweight gateway image.
diff --git a/policyengine_household_api/decorators/analytics.py b/policyengine_household_api/decorators/analytics.py
index 7d19c017..49e9783c 100644
--- a/policyengine_household_api/decorators/analytics.py
+++ b/policyengine_household_api/decorators/analytics.py
@@ -25,7 +25,7 @@
     ModalResolvedChannel,
     VariableUsageSummary,
 )
-from policyengine_household_api.utils.modal_routing_metadata import (
+from policyengine_household_api.modal_release.routing_metadata import (
     REQUESTED_VERSION_ENVIRON_KEY,
     RESOLVED_CHANNEL_ENVIRON_KEY,
 )
diff --git a/policyengine_household_api/modal_release/gateway.py b/policyengine_household_api/modal_release/gateway.py
index 6361ef00..2a911e77 100644
--- a/policyengine_household_api/modal_release/gateway.py
+++ b/policyengine_household_api/modal_release/gateway.py
@@ -13,7 +13,7 @@
     empty_manifest,
     validate_manifest,
 )
-from policyengine_household_api.utils.modal_routing_metadata import (
+from policyengine_household_api.modal_release.routing_metadata import (
     MODAL_ROUTING_PAYLOAD_KEY,
     modal_routing_payload,
 )
diff --git a/policyengine_household_api/utils/modal_routing_metadata.py b/policyengine_household_api/modal_release/routing_metadata.py
similarity index 75%
rename from policyengine_household_api/utils/modal_routing_metadata.py
rename to policyengine_household_api/modal_release/routing_metadata.py
index ac9123c7..a11aa2d9 100644
--- a/policyengine_household_api/utils/modal_routing_metadata.py
+++ b/policyengine_household_api/modal_release/routing_metadata.py
@@ -2,12 +2,14 @@
 
 from typing import Any
 
-from policyengine_household_api.models.analytics import ModalResolvedChannel
-
 
 MODAL_ROUTING_PAYLOAD_KEY = "modal_routing"
 REQUESTED_VERSION_ENVIRON_KEY = "policyengine.requested_version"
 RESOLVED_CHANNEL_ENVIRON_KEY = "policyengine.resolved_channel"
+# Keep this literal in sync with the app's channel values manually. Importing
+# the shared enum here pulls heavy, unnecessary dependencies into the Modal
+# gateway image and has broken production gateway startup.
+RESOLVED_CHANNEL_VALUES = {"current", "frontier"}
 
 
 def modal_routing_payload(
@@ -30,9 +32,7 @@ def routing_environ_overrides(payload: dict[str, Any]) -> dict[str, str]:
     resolved_channel = routing.get("resolved_channel")
     if not isinstance(requested_version, str) or not requested_version:
         return {}
-    if resolved_channel not in {
-        channel.value for channel in ModalResolvedChannel
-    }:
+    if resolved_channel not in RESOLVED_CHANNEL_VALUES:
         return {}
 
     return {
diff --git a/policyengine_household_api/modal_release/worker_dispatch.py b/policyengine_household_api/modal_release/worker_dispatch.py
index e6c3e4d3..f5042f87 100644
--- a/policyengine_household_api/modal_release/worker_dispatch.py
+++ b/policyengine_household_api/modal_release/worker_dispatch.py
@@ -2,7 +2,7 @@
 
 from typing import Any
 
-from policyengine_household_api.utils.modal_routing_metadata import (
+from policyengine_household_api.modal_release.routing_metadata import (
     routing_environ_overrides,
 )
 
diff --git a/tests/unit/endpoints/test_household.py b/tests/unit/endpoints/test_household.py
index b8b5e602..089187cc 100644
--- a/tests/unit/endpoints/test_household.py
+++ b/tests/unit/endpoints/test_household.py
@@ -3,7 +3,7 @@
 import pytest
 from policyengine_household_api.constants import COUNTRY_PACKAGE_VERSIONS
 from policyengine_household_api.endpoints.household import _validate_axes
-from policyengine_household_api.utils.modal_routing_metadata import (
+from policyengine_household_api.modal_release.routing_metadata import (
     REQUESTED_VERSION_ENVIRON_KEY,
     RESOLVED_CHANNEL_ENVIRON_KEY,
 )
diff --git a/tests/unit/modal_release/test_gateway.py b/tests/unit/modal_release/test_gateway.py
index 9298afef..5ee34767 100644
--- a/tests/unit/modal_release/test_gateway.py
+++ b/tests/unit/modal_release/test_gateway.py
@@ -11,7 +11,7 @@
 from policyengine_household_api.modal_release.manifest import (
     MANIFEST_SCHEMA_VERSION,
 )
-from policyengine_household_api.utils.modal_routing_metadata import (
+from policyengine_household_api.modal_release.routing_metadata import (
     MODAL_ROUTING_PAYLOAD_KEY,
 )
 
diff --git a/tests/unit/modal_release/test_worker_dispatch.py b/tests/unit/modal_release/test_worker_dispatch.py
index 8898b05d..87b9fcaa 100644
--- a/tests/unit/modal_release/test_worker_dispatch.py
+++ b/tests/unit/modal_release/test_worker_dispatch.py
@@ -3,7 +3,7 @@
 from policyengine_household_api.modal_release.worker_dispatch import (
     dispatch_to_flask_app,
 )
-from policyengine_household_api.utils.modal_routing_metadata import (
+from policyengine_household_api.modal_release.routing_metadata import (
     MODAL_ROUTING_PAYLOAD_KEY,
     REQUESTED_VERSION_ENVIRON_KEY,
     RESOLVED_CHANNEL_ENVIRON_KEY,