diff --git a/config/config.exs b/config/config.exs
index 417f298d7..ad7096669 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -222,7 +222,8 @@
     "text/plain",
     "text/html",
     "text/markdown",
-    "text/bbcode"
+    "text/bbcode",
+    "text/x.misskeymarkdown"
   ],
   staff_transparency: [],
   autofollowed_nicknames: [],
diff --git a/lib/pleroma/emoji.ex b/lib/pleroma/emoji.ex
index f4043ac80..9e1858ae7 100644
--- a/lib/pleroma/emoji.ex
+++ b/lib/pleroma/emoji.ex
@@ -165,7 +165,7 @@ def maybe_quote(name) when is_binary(name) do
 
   def maybe_quote(name), do: name
 
-  def emoji_url(%{"type" => "EmojiReact", "content" => emoji, "tag" => []}), do: nil
+  def emoji_url(%{"type" => "EmojiReact", "content" => _, "tag" => []}), do: nil
 
   def emoji_url(%{"type" => "EmojiReact", "content" => emoji, "tag" => tags}) do
     tag =
diff --git a/lib/pleroma/web/common_api/activity_draft.ex b/lib/pleroma/web/common_api/activity_draft.ex
index b4e3e37ae..08e704ed4 100644
--- a/lib/pleroma/web/common_api/activity_draft.ex
+++ b/lib/pleroma/web/common_api/activity_draft.ex
@@ -213,13 +213,14 @@ defp object(draft) do
       end
 
     emoji = Map.merge(emoji, summary_emoji)
-
     {:ok, note_data, _meta} = Builder.note(draft)
-
     object =
       note_data
       |> Map.put("emoji", emoji)
-      |> Map.put("source", draft.status)
+      |> Map.put("source", %{
+        "content" => draft.status,
+        "mediaType" => draft.params[:content_type]
+      })
       |> Map.put("generator", draft.params[:generator])
 
     %__MODULE__{draft | object: object}
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index b6feaf32a..8fde9ae15 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -291,6 +291,15 @@ def format_input(text, "text/markdown", options) do
     |> Formatter.html_escape("text/html")
   end
 
+  def format_input(text, "text/x.misskeymarkdown", options) do
+    text
+    |> Formatter.html_escape("text/plain")
+    |> Formatter.linkify(options)
+    |> (fn {text, mentions, tags} ->
+          {String.replace(text, ~r/\r?\n/, "<br>"), mentions, tags}
+        end).()
+  end
+
   def format_naive_asctime(date) do
     date |> DateTime.from_naive!("Etc/UTC") |> format_asctime
   end