diff --git a/CHANGELOG.md b/CHANGELOG.md
index f3394ecbc..f01dc3bd2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,31 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [2.0.4] - 2020-05-10
+
+### Security
+- AP C2S: Fix a potential DoS by creating nonsensical objects that break timelines
+
+### Fixed
+- Peertube user lookups not working
+- `InsertSkeletonsForDeletedUsers` migration failing on some instances
+- Healthcheck reporting the number of memory currently used, rather than allocated in total
+- LDAP not being usable in OTP releases
+- Default apache configuration having tls chain issues
+
+### Upgrade notes
+
+#### Apache only
+
+1. Remove the following line from your config:
+```
+    SSLCertificateFile      /etc/letsencrypt/live/${servername}/cert.pem
+```
+
+#### Everyone
+
+1. Restart Pleroma
+
 ## [2.0.3] - 2020-05-02
 
 ### Security
diff --git a/config/description.exs b/config/description.exs
index 5a1e9e9af..2623e3683 100644
--- a/config/description.exs
+++ b/config/description.exs
@@ -2260,6 +2260,7 @@ config :pleroma, :config_description, [
         children: [
           %{
             key: :active,
+            label: "Enabled",
             type: :boolean,
             description: "Globally enable or disable digest emails"
           },
diff --git a/installation/pleroma-apache.conf b/installation/pleroma-apache.conf
index b5640ac3d..0d627f2d7 100644
--- a/installation/pleroma-apache.conf
+++ b/installation/pleroma-apache.conf
@@ -32,9 +32,8 @@ CustomLog ${APACHE_LOG_DIR}/access.log combined
 
 <VirtualHost *:443>
     SSLEngine on
-    SSLCertificateFile      /etc/letsencrypt/live/${servername}/cert.pem
+    SSLCertificateFile      /etc/letsencrypt/live/${servername}/fullchain.pem
     SSLCertificateKeyFile   /etc/letsencrypt/live/${servername}/privkey.pem
-    SSLCertificateChainFile /etc/letsencrypt/live/${servername}/fullchain.pem
 
     # Mozilla modern configuration, tweak to your needs
     SSLProtocol             all -SSLv3 -TLSv1 -TLSv1.1
diff --git a/lib/pleroma/healthcheck.ex b/lib/pleroma/healthcheck.ex
index 8f7f43ec2..92ce83cb7 100644
--- a/lib/pleroma/healthcheck.ex
+++ b/lib/pleroma/healthcheck.ex
@@ -29,7 +29,7 @@ defmodule Pleroma.Healthcheck do
   @spec system_info() :: t()
   def system_info do
     %Healthcheck{
-      memory_used: Float.round(:erlang.memory(:total) / 1024 / 1024, 2)
+      memory_used: Float.round(:recon_alloc.memory(:allocated) / 1024 / 1024, 2)
     }
     |> assign_db_info()
     |> assign_job_queue_stats()
diff --git a/lib/pleroma/web/activity_pub/activity_pub_controller.ex b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
index 779de0e4d..2bb5bd15b 100644
--- a/lib/pleroma/web/activity_pub/activity_pub_controller.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub_controller.ex
@@ -370,7 +370,10 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     |> json(err)
   end
 
-  def handle_user_activity(user, %{"type" => "Create"} = params) do
+  defp handle_user_activity(
+         %User{} = user,
+         %{"type" => "Create", "object" => %{"type" => "Note"}} = params
+       ) do
     object =
       params["object"]
       |> Map.merge(Map.take(params, ["to", "cc"]))
@@ -386,7 +389,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     })
   end
 
-  def handle_user_activity(user, %{"type" => "Delete"} = params) do
+  defp handle_user_activity(user, %{"type" => "Delete"} = params) do
     with %Object{} = object <- Object.normalize(params["object"]),
          true <- user.is_moderator || user.ap_id == object.data["actor"],
          {:ok, delete} <- ActivityPub.delete(object) do
@@ -396,7 +399,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     end
   end
 
-  def handle_user_activity(user, %{"type" => "Like"} = params) do
+  defp handle_user_activity(user, %{"type" => "Like"} = params) do
     with %Object{} = object <- Object.normalize(params["object"]),
          {:ok, activity, _object} <- ActivityPub.like(user, object) do
       {:ok, activity}
@@ -405,7 +408,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do
     end
   end
 
-  def handle_user_activity(_, _) do
+  defp handle_user_activity(_, _) do
     {:error, dgettext("errors", "Unhandled activity type")}
   end
 
diff --git a/lib/pleroma/web/web_finger/web_finger.ex b/lib/pleroma/web/web_finger/web_finger.ex
index 43a81c75d..8f71820d7 100644
--- a/lib/pleroma/web/web_finger/web_finger.ex
+++ b/lib/pleroma/web/web_finger/web_finger.ex
@@ -193,13 +193,15 @@ defmodule Pleroma.Web.WebFinger do
           URI.parse(account).host
       end
 
+    encoded_account = URI.encode("acct:#{account}")
+
     address =
       case find_lrdd_template(domain) do
         {:ok, template} ->
-          String.replace(template, "{uri}", URI.encode(account))
+          String.replace(template, "{uri}", encoded_account)
 
         _ ->
-          "https://#{domain}/.well-known/webfinger?resource=acct:#{account}"
+          "https://#{domain}/.well-known/webfinger?resource=#{encoded_account}"
       end
 
     with response <-
diff --git a/mix.exs b/mix.exs
index 3f3990ea2..9f9679f62 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,7 +4,7 @@ defmodule Pleroma.Mixfile do
   def project do
     [
       app: :pleroma,
-      version: version("2.0.3"),
+      version: version("2.0.4"),
       elixir: "~> 1.8",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: [:phoenix, :gettext] ++ Mix.compilers(),
@@ -63,7 +63,15 @@ defmodule Pleroma.Mixfile do
   def application do
     [
       mod: {Pleroma.Application, []},
-      extra_applications: [:logger, :runtime_tools, :comeonin, :quack, :fast_sanitize, :ssl],
+      extra_applications: [
+        :logger,
+        :runtime_tools,
+        :comeonin,
+        :quack,
+        :fast_sanitize,
+        :ssl,
+        :eldap
+      ],
       included_applications: [:ex_syslogger]
     ]
   end
diff --git a/priv/repo/migrations/20200428221338_insert_skeletons_for_deleted_users.exs b/priv/repo/migrations/20200428221338_insert_skeletons_for_deleted_users.exs
index 11d9a70ba..2adc38186 100644
--- a/priv/repo/migrations/20200428221338_insert_skeletons_for_deleted_users.exs
+++ b/priv/repo/migrations/20200428221338_insert_skeletons_for_deleted_users.exs
@@ -30,7 +30,7 @@ defmodule Pleroma.Repo.Migrations.InsertSkeletonsForDeletedUsers do
           Repo,
           "select distinct unnest(nonexistent_locals.recipients) from activities, lateral (select array_agg(recipient) as recipients from unnest(activities.recipients) as recipient where recipient similar to '#{
             instance_uri
-          }/users/[A-Za-z0-9]*' and not(recipient in (select ap_id from users where local = true))) nonexistent_locals;",
+          }/users/[A-Za-z0-9]*' and not(recipient in (select ap_id from users))) nonexistent_locals;",
           [],
           timeout: :infinity
         )
diff --git a/test/support/http_request_mock.ex b/test/support/http_request_mock.ex
index 79ab129fd..890a43cc1 100644
--- a/test/support/http_request_mock.ex
+++ b/test/support/http_request_mock.ex
@@ -211,7 +211,7 @@ defmodule HttpRequestMock do
   end
 
   def get(
-        "https://squeet.me/xrd/?uri=lain@squeet.me",
+        "https://squeet.me/xrd/?uri=acct:lain@squeet.me",
         _,
         _,
         Accept: "application/xrd+xml,application/jrd+json"
@@ -850,7 +850,7 @@ defmodule HttpRequestMock do
   end
 
   def get(
-        "https://social.heldscal.la/.well-known/webfinger?resource=shp@social.heldscal.la",
+        "https://social.heldscal.la/.well-known/webfinger?resource=acct:shp@social.heldscal.la",
         _,
         _,
         Accept: "application/xrd+xml,application/jrd+json"
@@ -863,7 +863,7 @@ defmodule HttpRequestMock do
   end
 
   def get(
-        "https://social.heldscal.la/.well-known/webfinger?resource=invalid_content@social.heldscal.la",
+        "https://social.heldscal.la/.well-known/webfinger?resource=acct:invalid_content@social.heldscal.la",
         _,
         _,
         Accept: "application/xrd+xml,application/jrd+json"
@@ -880,7 +880,7 @@ defmodule HttpRequestMock do
   end
 
   def get(
-        "http://framatube.org/main/xrd?uri=framasoft@framatube.org",
+        "http://framatube.org/main/xrd?uri=acct:framasoft@framatube.org",
         _,
         _,
         Accept: "application/xrd+xml,application/jrd+json"
@@ -939,7 +939,7 @@ defmodule HttpRequestMock do
   end
 
   def get(
-        "https://gerzilla.de/xrd/?uri=kaniini@gerzilla.de",
+        "https://gerzilla.de/xrd/?uri=acct:kaniini@gerzilla.de",
         _,
         _,
         Accept: "application/xrd+xml,application/jrd+json"
@@ -1135,7 +1135,7 @@ defmodule HttpRequestMock do
   end
 
   def get(
-        "https://zetsubou.xn--q9jyb4c/.well-known/webfinger?resource=lain@zetsubou.xn--q9jyb4c",
+        "https://zetsubou.xn--q9jyb4c/.well-known/webfinger?resource=acct:lain@zetsubou.xn--q9jyb4c",
         _,
         _,
         Accept: "application/xrd+xml,application/jrd+json"
@@ -1148,7 +1148,7 @@ defmodule HttpRequestMock do
   end
 
   def get(
-        "https://zetsubou.xn--q9jyb4c/.well-known/webfinger?resource=https://zetsubou.xn--q9jyb4c/users/lain",
+        "https://zetsubou.xn--q9jyb4c/.well-known/webfinger?resource=acct:https://zetsubou.xn--q9jyb4c/users/lain",
         _,
         _,
         Accept: "application/xrd+xml,application/jrd+json"
diff --git a/test/web/activity_pub/activity_pub_controller_test.exs b/test/web/activity_pub/activity_pub_controller_test.exs
index b2352538a..c418232da 100644
--- a/test/web/activity_pub/activity_pub_controller_test.exs
+++ b/test/web/activity_pub/activity_pub_controller_test.exs
@@ -652,9 +652,25 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
 
       assert response(conn, 200) =~ announce_activity.data["object"]
     end
+  end
 
-    test "it rejects posts from other users", %{conn: conn} do
-      data = File.read!("test/fixtures/activitypub-client-post-activity.json") |> Poison.decode!()
+  describe "POST /users/:nickname/outbox (C2S)" do
+    setup do
+      [
+        activity: %{
+          "@context" => "https://www.w3.org/ns/activitystreams",
+          "type" => "Create",
+          "object" => %{"type" => "Note", "content" => "AP C2S test"},
+          "to" => "https://www.w3.org/ns/activitystreams#Public",
+          "cc" => []
+        }
+      ]
+    end
+
+    test "it rejects posts from other users / unauthenticated users", %{
+      conn: conn,
+      activity: activity
+    } do
       user = insert(:user)
       otheruser = insert(:user)
 
@@ -662,39 +678,76 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubControllerTest do
         conn
         |> assign(:user, otheruser)
         |> put_req_header("content-type", "application/activity+json")
-        |> post("/users/#{user.nickname}/outbox", data)
+        |> post("/users/#{user.nickname}/outbox", activity)
 
       assert json_response(conn, 403)
     end
 
-    test "it inserts an incoming create activity into the database", %{conn: conn} do
-      data = File.read!("test/fixtures/activitypub-client-post-activity.json") |> Poison.decode!()
+    test "it inserts an incoming create activity into the database", %{
+      conn: conn,
+      activity: activity
+    } do
       user = insert(:user)
 
-      conn =
+      result =
         conn
         |> assign(:user, user)
         |> put_req_header("content-type", "application/activity+json")
-        |> post("/users/#{user.nickname}/outbox", data)
-
-      result = json_response(conn, 201)
+        |> post("/users/#{user.nickname}/outbox", activity)
+        |> json_response(201)
 
       assert Activity.get_by_ap_id(result["id"])
+      assert result["object"]
+      assert %Object{data: object} = Object.normalize(result["object"])
+      assert object["content"] == activity["object"]["content"]
     end
 
-    test "it rejects an incoming activity with bogus type", %{conn: conn} do
-      data = File.read!("test/fixtures/activitypub-client-post-activity.json") |> Poison.decode!()
+    test "it rejects anything beyond 'Note' creations", %{conn: conn, activity: activity} do
       user = insert(:user)
 
-      data =
-        data
-        |> Map.put("type", "BadType")
+      activity =
+        activity
+        |> put_in(["object", "type"], "Benis")
+
+      _result =
+        conn
+        |> assign(:user, user)
+        |> put_req_header("content-type", "application/activity+json")
+        |> post("/users/#{user.nickname}/outbox", activity)
+        |> json_response(400)
+    end
+
+    test "it inserts an incoming sensitive activity into the database", %{
+      conn: conn,
+      activity: activity
+    } do
+      user = insert(:user)
+      object = Map.put(activity["object"], "sensitive", true)
+      activity = Map.put(activity, "object", object)
+
+      result =
+        conn
+        |> assign(:user, user)
+        |> put_req_header("content-type", "application/activity+json")
+        |> post("/users/#{user.nickname}/outbox", activity)
+        |> json_response(201)
+
+      assert Activity.get_by_ap_id(result["id"])
+      assert result["object"]
+      assert %Object{data: object} = Object.normalize(result["object"])
+      assert object["sensitive"] == activity["object"]["sensitive"]
+      assert object["content"] == activity["object"]["content"]
+    end
+
+    test "it rejects an incoming activity with bogus type", %{conn: conn, activity: activity} do
+      user = insert(:user)
+      activity = Map.put(activity, "type", "BadType")
 
       conn =
         conn
         |> assign(:user, user)
         |> put_req_header("content-type", "application/activity+json")
-        |> post("/users/#{user.nickname}/outbox", data)
+        |> post("/users/#{user.nickname}/outbox", activity)
 
       assert json_response(conn, 400)
     end