diff --git a/lib/nulla/models/note.ex b/lib/nulla/models/note.ex
index a054b87..9eb9468 100644
--- a/lib/nulla/models/note.ex
+++ b/lib/nulla/models/note.ex
@@ -12,6 +12,7 @@ defmodule Nulla.Models.Note do
     field :inReplyTo, :string
     field :published, :utc_datetime
     field :url, :string
+    field :visibility, :string
     field :to, {:array, :string}
     field :cc, {:array, :string}
     field :sensitive, :boolean, default: false
@@ -28,9 +29,11 @@ defmodule Nulla.Models.Note do
   def changeset(note, attrs) do
     note
     |> cast(attrs, [
+      :id,
       :inReplyTo,
       :published,
       :url,
+      :visibility,
       :to,
       :cc,
       :sensitive,
@@ -41,12 +44,12 @@ defmodule Nulla.Models.Note do
     |> validate_required([:published, :url, :to, :cc, :content, :language, :actor_id])
   end
 
-  def create_note(attrs, visibility)
-      when is_map(attrs) and visibility in ["public", "unlisted", "followers", "private"] do
+  def create_note(attrs) when is_map(attrs) do
     id = Map.get(attrs, :id, Snowflake.next_id())
     actor_id = Map.get(attrs, :actor_id)
     actor = Actor.get_actor(id: actor_id)
     published = Map.get(attrs, :published, DateTime.utc_now())
+    visibility = Map.get(attrs, :visibility, "public")
 
     url =
       case Map.get(attrs, :url) do
@@ -82,15 +85,21 @@ defmodule Nulla.Models.Note do
           cc = []
 
           {to, cc}
+
+        _ ->
+          raise ArgumentError, "Invalid visibility: #{visibility}"
       end
 
+    attrs =
+      attrs
+      |> Map.put(:id, id)
+      |> Map.put(:published, published)
+      |> Map.put(:url, url)
+      |> Map.put(:to, to)
+      |> Map.put(:cc, cc)
+
     %__MODULE__{}
     |> changeset(attrs)
-    |> put_change(:id, id)
-    |> put_change(:published, published)
-    |> put_change(:url, url)
-    |> put_change(:to, to)
-    |> put_change(:cc, cc)
     |> Repo.insert()
   end
 
diff --git a/lib/nulla_web/components/templates/actor/show.html.heex b/lib/nulla_web/components/templates/actor/show.html.heex
index d7a2d21..6f667cd 100644
--- a/lib/nulla_web/components/templates/actor/show.html.heex
+++ b/lib/nulla_web/components/templates/actor/show.html.heex
@@ -95,13 +95,13 @@
                 </div>
                 <div class="flex items-center space-x-2 text-sm text-gray-500">
                   <%= case note.visibility do %>
-                    <% :public -> %>
+                    <% "public" -> %>
                       <.icon name="hero-globe-americas" class="h-5 w-5" />
-                    <% :unlisted -> %>
+                    <% "unlisted" -> %>
                       <.icon name="hero-moon" class="h-5 w-5" />
-                    <% :followers -> %>
+                    <% "followers" -> %>
                       <.icon name="hero-lock-closed" class="h-5 w-5" />
-                    <% :private -> %>
+                    <% "private" -> %>
                       <.icon name="hero-at-symbol" class="h-5 w-5" />
                   <% end %>
                   <span>{format_note_datetime_diff(note.inserted_at)}</span>
diff --git a/priv/repo/migrations/20250615131431_create_notes.exs b/priv/repo/migrations/20250615131431_create_notes.exs
index 3115275..2513289 100644
--- a/priv/repo/migrations/20250615131431_create_notes.exs
+++ b/priv/repo/migrations/20250615131431_create_notes.exs
@@ -7,6 +7,7 @@ defmodule Nulla.Repo.Migrations.CreateNotes do
       add :inReplyTo, :string
       add :published, :utc_datetime
       add :url, :string
+      add :visibility, :string
       add :to, {:array, :string}
       add :cc, {:array, :string}
       add :sensitive, :boolean, default: false
diff --git a/test/nulla/http_signature_test.exs b/test/nulla/http_signature_test.exs
index 2983a17..afab9df 100644
--- a/test/nulla/http_signature_test.exs
+++ b/test/nulla/http_signature_test.exs
@@ -5,6 +5,7 @@ defmodule Nulla.HTTPSignatureTest do
   import Nulla.Fixtures.Data
   alias Nulla.HTTPSignature
   alias Nulla.Snowflake
+  alias Nulla.Models.User
   alias Nulla.Models.Actor
 
   setup do
@@ -15,6 +16,7 @@ defmodule Nulla.HTTPSignatureTest do
   test "make_headers/3 creates valid signature headers and verify/2 validates them" do
     actor = Actor.get_actor(preferredUsername: "test")
     target_actor = Actor.get_actor(preferredUsername: "test2")
+    user = User.get_user(id: actor.id)
 
     follow_activity = %{
       "@context" => "https://www.w3.org/ns/activitystreams",
@@ -25,7 +27,14 @@ defmodule Nulla.HTTPSignatureTest do
     }
 
     body = Jason.encode!(follow_activity)
-    headers = HTTPSignature.make_headers(body, target_actor.inbox, actor)
+
+    headers =
+      HTTPSignature.make_headers(
+        body,
+        target_actor.inbox,
+        actor.publicKey["id"],
+        user.privateKeyPem
+      )
 
     conn =
       conn(:post, "/users/test2/inbox", body)
diff --git a/test/support/fixtures/data.ex b/test/support/fixtures/data.ex
index 8e40b58..d2944ab 100644
--- a/test/support/fixtures/data.ex
+++ b/test/support/fixtures/data.ex
@@ -48,7 +48,8 @@ defmodule Nulla.Fixtures.Data do
       actor_url: actor.url,
       content: "Hello World from Nulla!",
       language: "en",
-      actor_id: actor.id
+      actor_id: actor.id,
+      visibility: "public"
     })
 
     {publicKeyPem, privateKeyPem} = KeyGen.gen()