diff --git a/proca/lib/proca/stage/event.ex b/proca/lib/proca/stage/event.ex
index 50c6c565..05490d5c 100644
--- a/proca/lib/proca/stage/event.ex
+++ b/proca/lib/proca/stage/event.ex
@@ -16,7 +16,7 @@ defmodule Proca.Stage.Event do
   """
   alias Proca.{Confirm, Org, Supporter}
   alias Proca.Pipes.Connection
-  import Proca.Stage.Support, only: [camel_case_keys: 1, to_iso8601: 1]
+  import Proca.Stage.Support, only: [camel_case_keys: 2, to_iso8601: 1]
 
   @doc """
   Routing key for the event message is two-element topic routing key for confirms (because they have subtype), and one element key for CRUD events.
@@ -58,7 +58,7 @@ defmodule Proca.Stage.Event do
 
     meta
     |> put_data(event, record, opts ++ [org_id: org_id])
-    |> camel_case_keys()
+    |> camel_case_keys(ignore: :config)
     |> Connection.publish(exchange_for(org_id), rkey)
   end
 
diff --git a/proca/lib/proca/stage/support.ex b/proca/lib/proca/stage/support.ex
index f48e5a64..c700daa8 100644
--- a/proca/lib/proca/stage/support.ex
+++ b/proca/lib/proca/stage/support.ex
@@ -5,7 +5,7 @@ defmodule Proca.Stage.Support do
   (system) or externally (custom).
   """
 
-  alias Proca.{Action, Supporter, PublicKey, Contact, Field, Confirm}
+  alias Proca.{Action, Supporter, Confirm}
   alias Proca.Repo
   import Ecto.Query, only: [from: 2]
   alias Broadway.Message
@@ -181,7 +181,10 @@ defmodule Proca.Stage.Support do
 
   def stringify_keys(map = %{}) do
     map
-    |> Enum.map(fn {k, v} -> {Atom.to_string(k), stringify_keys(v)} end)
+    |> Enum.map(fn
+      {k, v} when is_atom(k) -> {Atom.to_string(k), stringify_keys(v)}
+      {k, v} when is_bitstring(k) -> {k, stringify_keys(v)}
+    end)
     |> Enum.into(%{})
   end
 
@@ -201,15 +204,23 @@ defmodule Proca.Stage.Support do
   @doc """
   Turn the case of keys in the map to camel case
   """
-  def camel_case_keys(map) when is_map(map) do
+  def camel_case_keys(map, opts \\ [])
+
+  def camel_case_keys(map, opts) when is_map(map) do
+    ignored_key = Keyword.get(opts, :ignore)
+
     map
     |> Enum.map(fn {key, val} ->
-      {ProperCase.camel_case(key), camel_case_keys(val)}
+      if key == ignored_key do
+        {ProperCase.camel_case(key), stringify_keys(val)}
+      else
+        {ProperCase.camel_case(key), camel_case_keys(val, opts)}
+      end
     end)
     |> Map.new()
   end
 
-  def camel_case_keys(other), do: other
+  def camel_case_keys(other, _opts), do: other
 
   @doc """
   Unpack this AMQP metadata
diff --git a/proca/mix.exs b/proca/mix.exs
index 0fb879f8..9c61d38b 100644
--- a/proca/mix.exs
+++ b/proca/mix.exs
@@ -4,7 +4,7 @@ defmodule Proca.MixProject do
   def project do
     [
       app: :proca,
-      version: "3.4.5",
+      version: "3.4.6",
       elixir: "~> 1.7",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: [:phoenix, :gettext] ++ Mix.compilers(),
diff --git a/proca/test/stage/support_test.exs b/proca/test/stage/support_test.exs
new file mode 100644
index 00000000..127e2c15
--- /dev/null
+++ b/proca/test/stage/support_test.exs
@@ -0,0 +1,52 @@
+defmodule Proca.Stage.SupportTest do
+  use Proca.DataCase
+
+  import Proca.StoryFactory, only: [red_story: 0]
+
+  alias Proca.Stage.Support
+
+  setup do
+    red_story()
+  end
+
+  test "camel_case_keys ignores config", %{
+    red_campaign: camp,
+    red_org: org
+  } do
+    org_data = %{
+      name: org.name,
+      title: org.title,
+      config: %{
+        some_field: "value",
+        replace: %{
+          "https://example.com/example-candidats" => "https://url.com/other-candidats"
+        }
+      }
+    }
+
+    camp_data =
+      camp
+      |> Map.from_struct()
+      |> Map.replace(:config, %{some_key: "val"})
+      |> Map.take([:id, :name, :external_id, :title, :config, :contact_schema])
+      |> Map.put(:org, org_data)
+
+    camelized_map =
+      camp_data
+      |> Support.camel_case_keys(ignore: :config)
+
+    assert %{
+             "externalId" => _,
+             "contactSchema" => _,
+             "title" => _,
+             "config" => %{"some_key" => _},
+             "org" => %{
+               "name" => _,
+               "config" => %{
+                 "some_field" => _,
+                 "replace" => %{"https://example.com/example-candidats" => _}
+               }
+             }
+           } = camelized_map
+  end
+end