diff --git a/lib/dotcom/alerts.ex b/lib/dotcom/alerts.ex
index 6fcf6df3ca..646d5cd29c 100644
--- a/lib/dotcom/alerts.ex
+++ b/lib/dotcom/alerts.ex
@@ -10,7 +10,7 @@ defmodule Dotcom.Alerts do
   @doc """
   Does the alert have an effect that is considered service-impacting?
   """
-  @spec service_impacting_alert?(%Alert{}) :: boolean()
+  @spec service_impacting_alert?(%Alert.t()) :: boolean()
   def service_impacting_alert?(%Alert{effect: effect}) do
     effect in @service_impacting_effects
   end
diff --git a/lib/dotcom/alerts/disruptions/subway.ex b/lib/dotcom/alerts/disruptions/subway.ex
index 8a97b40176..3315d502e0 100644
--- a/lib/dotcom/alerts/disruptions/subway.ex
+++ b/lib/dotcom/alerts/disruptions/subway.ex
@@ -15,7 +15,7 @@ defmodule Dotcom.Alerts.Disruptions.Subway do
   @doc """
   Disruptions that occur any time after today's service range.
   """
-  @spec future_disruptions() :: %{Utils.ServiceDateTime.service_range() => [%Alert{}]}
+  @spec future_disruptions() :: %{Utils.ServiceDateTime.service_range() => [Alert.t()]}
   def future_disruptions() do
     disruption_groups() |> Map.take([:this_week, :next_week, :later])
   end
@@ -23,7 +23,7 @@ defmodule Dotcom.Alerts.Disruptions.Subway do
   @doc """
   Disruptions that occur during today's service range.
   """
-  @spec todays_disruptions() :: %{Utils.ServiceDateTime.service_range() => [%Alert{}]}
+  @spec todays_disruptions() :: %{Utils.ServiceDateTime.service_range() => [Alert.t()]}
   def todays_disruptions() do
     disruption_groups() |> Map.take([:today])
   end