diff --git a/docker/Dockerfile b/docker/Dockerfile
index 23ae6081f361..a0f0e10ce95f 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.13.0-slim-bullseye as sdist
+FROM python:3.11.4-slim-bullseye as sdist
 
 LABEL maintainer="oss@netflix.com"
 LABEL org.opencontainers.image.title="Dispatch PyPI Wheel"
@@ -56,7 +56,7 @@ RUN YARN_CACHE_FOLDER="$(mktemp -d)" \
     && mv /usr/src/dispatch/dist /dist
 
 # This is the image to be run
-FROM python:3.13.0-slim-bullseye
+FROM python:3.11.4-slim-bullseye
 
 LABEL maintainer="oss@dispatch.io"
 LABEL org.opencontainers.image.title="Dispatch"
diff --git a/src/dispatch/plugins/dispatch_core/plugin.py b/src/dispatch/plugins/dispatch_core/plugin.py
index 2dbeb354a615..f8e881f160aa 100644
--- a/src/dispatch/plugins/dispatch_core/plugin.py
+++ b/src/dispatch/plugins/dispatch_core/plugin.py
@@ -211,6 +211,7 @@ def update(
         document_weblink: str,
         storage_weblink: str,
         conference_weblink: str,
+        dispatch_weblink: str,
         cost: float,
         incident_type_plugin_metadata: dict = None,
     ):
diff --git a/src/dispatch/plugins/dispatch_slack/endpoints.py b/src/dispatch/plugins/dispatch_slack/endpoints.py
index 05785a844c57..9ccdf425c215 100644
--- a/src/dispatch/plugins/dispatch_slack/endpoints.py
+++ b/src/dispatch/plugins/dispatch_slack/endpoints.py
@@ -81,7 +81,18 @@ def get_request_handler(request: Request, body: bytes, organization: str) -> Sla
 )
 async def slack_events(request: Request, organization: str, body: bytes = Depends(get_body)):
     """Handle all incoming Slack events."""
+
     handler = get_request_handler(request=request, body=body, organization=organization)
+    try:
+        body_json = json.loads(body)
+        # if we're getting the url verification request,
+        # handle it synchronously so that slack api verification works
+        if body_json.get("type") == "url_verification":
+            return handler.handle(req=request, body=body)
+    except json.JSONDecodeError:
+        pass
+
+    # otherwise, handle it asynchronously
     task = BackgroundTask(handler.handle, req=request, body=body)
     return JSONResponse(
         background=task,
diff --git a/src/dispatch/signal/views.py b/src/dispatch/signal/views.py
index 6b38f20c5568..e8dab18aabe7 100644
--- a/src/dispatch/signal/views.py
+++ b/src/dispatch/signal/views.py
@@ -241,7 +241,7 @@ def update_filter(
     signal_filter_in: SignalFilterUpdate,
 ):
     """Updates an existing signal filter."""
-    signal_filter = get_signal_filter(db_session=db_session, signal_id=signal_filter_id)
+    signal_filter = get_signal_filter(db_session=db_session, signal_filter_id=signal_filter_id)
     if not signal_filter:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
diff --git a/tests/incident_cost/test_incident_cost_service.py b/tests/incident_cost/test_incident_cost_service.py
index 0e22ced9d4e0..c38f8ee04619 100644
--- a/tests/incident_cost/test_incident_cost_service.py
+++ b/tests/incident_cost/test_incident_cost_service.py
@@ -109,7 +109,7 @@ def test_calculate_incident_response_cost_with_cost_model(
 ):
     """Tests that the incident cost is calculated correctly when a cost model is enabled."""
     from datetime import timedelta
-    from decimal import Decimal, ROUND_UP
+    from decimal import Decimal, ROUND_HALF_UP
     from dispatch.incident_cost.service import update_incident_response_cost, get_hourly_rate
     from dispatch.incident_cost_type import service as incident_cost_type_service
     from dispatch.participant_activity.service import (
@@ -154,8 +154,8 @@ def test_calculate_incident_response_cost_with_cost_model(
     ) * hourly_rate + orig_total_incident_cost
 
     assert cost
-    assert cost == Decimal(expected_incident_cost).quantize(cost, rounding=ROUND_UP)
-    assert cost == Decimal(incident.total_cost).quantize(cost, rounding=ROUND_UP)
+    assert cost == Decimal(expected_incident_cost).quantize(cost, rounding=ROUND_HALF_UP)
+    assert cost == Decimal(incident.total_cost).quantize(cost, rounding=ROUND_HALF_UP)
 
 
 def test_calculate_incident_response_cost_with_cost_model__no_enabled_plugins(