diff --git a/lib/federation/activity_stream/converter/utils.ex b/lib/federation/activity_stream/converter/utils.ex
index c0b1100a5..760fdc28c 100644
--- a/lib/federation/activity_stream/converter/utils.ex
+++ b/lib/federation/activity_stream/converter/utils.ex
@@ -205,9 +205,7 @@ defmodule Mobilizon.Federation.ActivityStream.Converter.Utils do
 
   @spec process_pictures(map(), integer()) :: Keyword.t()
   def process_pictures(object, actor_id) do
-    attachements = Map.get(object, "attachment", [])
-
-    {banner, media_attachements} = get_medias(attachements)
+    {banner, media_attachements} = get_medias(object)
 
     media_attachements_map =
       media_attachements
@@ -259,24 +257,46 @@ defmodule Mobilizon.Federation.ActivityStream.Converter.Utils do
     do: String.replace(body, old_url, new_url)
 
   @spec get_medias(list(map())) :: {map(), list(map())}
-  defp get_medias(attachments) do
-    banner = get_banner_picture(attachments)
-    {banner, Enum.filter(attachments, &(&1["type"] == "Document" && &1["url"] != banner["url"]))}
+  def get_medias(object) do
+    banner = get_banner_picture(object)
+    attachments = Map.get(object, "attachment", [])
+    {banner, Enum.filter(attachments, &(valid_banner_media?(&1) && &1["url"] != banner["url"]))}
   end
 
-  @spec get_banner_picture(list(map())) :: map()
-  defp get_banner_picture(attachments) do
-    # Prefer media with
-    media_with_picture_name =
-      Enum.find(attachments, &(&1["type"] == "Document" && &1["name"] == @banner_picture_name))
+  @spec get_banner_picture(map()) :: map()
+  defp get_banner_picture(object) do
+    attachments = Map.get(object, "attachment", [])
+    image = Map.get(object, "image", %{})
 
-    case media_with_picture_name do
-      # If no banner found, use the first media
-      nil -> Enum.find(attachments, &(&1["type"] == "Document"))
-      media_with_picture_name -> media_with_picture_name
+    media_with_picture_name =
+      Enum.find(attachments, &(valid_banner_media?(&1) && &1["name"] == @banner_picture_name))
+
+    cond do
+      # Check if the "image" key is set and of type "Document" or "Image"
+      is_nil(media_with_picture_name) and valid_banner_media?(image) ->
+        image
+
+      is_nil(media_with_picture_name) and Enum.find(attachments, &valid_banner_media?/1) ->
+        Enum.find(attachments, &valid_banner_media?/1)
+
+      !is_nil(media_with_picture_name) ->
+        media_with_picture_name
+
+      true ->
+        nil
     end
   end
 
+  @spec valid_banner_media?(map()) :: boolean()
+  defp valid_banner_media?(media) do
+    media |> Map.get("type") |> valid_attachment_type?()
+  end
+
+  @spec valid_attachment_type?(any()) :: boolean()
+  defp valid_attachment_type?(type) do
+    type in ["Document", "Image"]
+  end
+
   @spec get_address(map | binary | nil) :: Address.t() | nil
   def get_address(text_address) when is_binary(text_address) do
     get_address(%{"type" => "Place", "name" => text_address})
diff --git a/test/federation/activity_stream/converter/utils_test.exs b/test/federation/activity_stream/converter/utils_test.exs
new file mode 100644
index 000000000..c26f7b2a0
--- /dev/null
+++ b/test/federation/activity_stream/converter/utils_test.exs
@@ -0,0 +1,76 @@
+defmodule Mobilizon.Federation.ActivityStream.Converter.UtilsTest do
+  @moduledoc """
+  Module to test converting from EventMetadata to AS
+  """
+  use Mobilizon.DataCase
+  import Mobilizon.Factory
+  alias Mobilizon.Federation.ActivityStream.Converter.Utils
+
+  describe "get_medias/1" do
+    test "getting banner from Document attachment" do
+      data =
+        File.read!("test/fixtures/mobilizon-post-activity-media.json")
+        |> Jason.decode!()
+        |> Map.get("object")
+
+      assert Utils.get_medias(data) ==
+               {%{
+                  "blurhash" => "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{",
+                  "mediaType" => "image/png",
+                  "name" => nil,
+                  "type" => "Document",
+                  "url" => "https://mobilizon.fr/some-image"
+                }, []}
+    end
+
+    test "getting banner from image property" do
+      data =
+        File.read!("test/fixtures/mobilizon-post-activity-media-1.json")
+        |> Jason.decode!()
+        |> Map.get("object")
+
+      assert Utils.get_medias(data) ==
+               {%{
+                  "blurhash" => "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{",
+                  "mediaType" => "image/png",
+                  "name" => nil,
+                  "type" => "Image",
+                  "url" => "https://mobilizon.fr/some-image-1"
+                },
+                [
+                  %{
+                    "blurhash" => "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{",
+                    "mediaType" => "image/png",
+                    "name" => nil,
+                    "type" => "Document",
+                    "url" => "https://mobilizon.fr/some-image"
+                  }
+                ]}
+    end
+
+    test "getting banner from attachment named \"Banner\"" do
+      data =
+        File.read!("test/fixtures/mobilizon-post-activity-media-2.json")
+        |> Jason.decode!()
+        |> Map.get("object")
+
+      assert Utils.get_medias(data) ==
+               {%{
+                  "blurhash" => "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{",
+                  "mediaType" => "image/png",
+                  "name" => "Banner",
+                  "type" => "Document",
+                  "url" => "https://mobilizon.fr/some-image-2"
+                },
+                [
+                  %{
+                    "blurhash" => "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{",
+                    "mediaType" => "image/png",
+                    "name" => nil,
+                    "type" => "Document",
+                    "url" => "https://mobilizon.fr/some-image-1"
+                  }
+                ]}
+    end
+  end
+end
diff --git a/test/fixtures/mobilizon-post-activity-media-1.json b/test/fixtures/mobilizon-post-activity-media-1.json
new file mode 100644
index 000000000..542111d1d
--- /dev/null
+++ b/test/fixtures/mobilizon-post-activity-media-1.json
@@ -0,0 +1,106 @@
+{
+  "@context": [
+    "https://www.w3.org/ns/activitystreams",
+    "https://litepub.social/litepub/context.jsonld",
+    {
+      "Hashtag": "as:Hashtag",
+      "category": "sc:category",
+      "ical": "http://www.w3.org/2002/12/cal/ical#",
+      "joinMode": {
+        "@id": "mz:joinMode",
+        "@type": "mz:joinModeType"
+      },
+      "joinModeType": {
+        "@id": "mz:joinModeType",
+        "@type": "rdfs:Class"
+      },
+      "maximumAttendeeCapacity": "sc:maximumAttendeeCapacity",
+      "mz": "https://joinmobilizon.org/ns#",
+      "repliesModerationOption": {
+        "@id": "mz:repliesModerationOption",
+        "@type": "mz:repliesModerationOptionType"
+      },
+      "repliesModerationOptionType": {
+        "@id": "mz:repliesModerationOptionType",
+        "@type": "rdfs:Class"
+      },
+      "sc": "http://schema.org#",
+      "uuid": "sc:identifier"
+    }
+  ],
+  "actor": "https://mobilizon.fr/@metacartes",
+  "cc": [
+    "https://framapiaf.org/users/admin/followers",
+    "https://framapiaf.org/users/tcit"
+  ],
+  "id": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93/activity",
+  "object": {
+    "attachment": [
+      {
+        "href": "https://something.org",
+        "mediaType": "text/html",
+        "name": "Another link",
+        "type": "Link"
+      },
+      {
+        "href": "https://google.com",
+        "mediaType": "text/html",
+        "name": "Website",
+        "type": "Link"
+      },
+      {
+        "type": "Document",
+        "mediaType": "image/png",
+        "url": "https://mobilizon.fr/some-image",
+        "name": null,
+        "blurhash": "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{"
+      }
+    ],
+    "attributedTo": "https://mobilizon.fr/@metacartes",
+    "startTime": "2018-02-12T14:08:20Z",
+    "cc": [
+      "https://framapiaf.org/users/admin/followers",
+      "https://framapiaf.org/users/tcit"
+    ],
+    "content": "<p><span class=\"h-card\"><a href=\"https://framapiaf.org/users/tcit\" class=\"u-url mention\">@<span>tcit</span></a></span></p>",
+    "category": "TODO remove me",
+    "id": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93",
+    "image": {
+      "type": "Image",
+      "mediaType": "image/png",
+      "url": "https://mobilizon.fr/some-image-1",
+      "name": null,
+      "blurhash": "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{"
+    },
+    "inReplyTo": null,
+    "location": {
+      "type": "Place",
+      "name": "Locaux de Framasoft",
+      "id": "https://event1.tcit.fr/address/eeecc11d-0030-43e8-a897-6422876372jd",
+      "address": {
+        "type": "PostalAddress",
+        "streetAddress": "10 Rue Jangot",
+        "postalCode": "69007",
+        "addressLocality": "Lyon",
+        "addressRegion": "Auvergne Rhône Alpes",
+        "addressCountry": "France"
+      }
+    },
+    "name": "My first event",
+    "published": "2018-02-12T14:08:20Z",
+    "tag": [
+      {
+        "href": "https://framapiaf.org/users/tcit",
+        "name": "@tcit@framapiaf.org",
+        "type": "Mention"
+      }
+    ],
+    "to": ["https://www.w3.org/ns/activitystreams#Public"],
+    "type": "Event",
+    "url": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93",
+    "uuid": "109ccdfd-ee3e-46e1-a877-6c228763df0c"
+  },
+  "published": "2018-02-12T14:08:20Z",
+  "to": ["https://www.w3.org/ns/activitystreams#Public"],
+  "type": "Create"
+}
diff --git a/test/fixtures/mobilizon-post-activity-media-2.json b/test/fixtures/mobilizon-post-activity-media-2.json
new file mode 100644
index 000000000..b6cdc51ff
--- /dev/null
+++ b/test/fixtures/mobilizon-post-activity-media-2.json
@@ -0,0 +1,106 @@
+{
+  "@context": [
+    "https://www.w3.org/ns/activitystreams",
+    "https://litepub.social/litepub/context.jsonld",
+    {
+      "Hashtag": "as:Hashtag",
+      "category": "sc:category",
+      "ical": "http://www.w3.org/2002/12/cal/ical#",
+      "joinMode": {
+        "@id": "mz:joinMode",
+        "@type": "mz:joinModeType"
+      },
+      "joinModeType": {
+        "@id": "mz:joinModeType",
+        "@type": "rdfs:Class"
+      },
+      "maximumAttendeeCapacity": "sc:maximumAttendeeCapacity",
+      "mz": "https://joinmobilizon.org/ns#",
+      "repliesModerationOption": {
+        "@id": "mz:repliesModerationOption",
+        "@type": "mz:repliesModerationOptionType"
+      },
+      "repliesModerationOptionType": {
+        "@id": "mz:repliesModerationOptionType",
+        "@type": "rdfs:Class"
+      },
+      "sc": "http://schema.org#",
+      "uuid": "sc:identifier"
+    }
+  ],
+  "actor": "https://mobilizon.fr/@metacartes",
+  "cc": [
+    "https://framapiaf.org/users/admin/followers",
+    "https://framapiaf.org/users/tcit"
+  ],
+  "id": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93/activity",
+  "object": {
+    "attachment": [
+      {
+        "href": "https://something.org",
+        "mediaType": "text/html",
+        "name": "Another link",
+        "type": "Link"
+      },
+      {
+        "href": "https://google.com",
+        "mediaType": "text/html",
+        "name": "Website",
+        "type": "Link"
+      },
+      {
+        "type": "Document",
+        "mediaType": "image/png",
+        "url": "https://mobilizon.fr/some-image-1",
+        "name": null,
+        "blurhash": "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{"
+      },
+      {
+        "type": "Document",
+        "mediaType": "image/png",
+        "url": "https://mobilizon.fr/some-image-2",
+        "name": "Banner",
+        "blurhash": "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{"
+      }
+    ],
+    "attributedTo": "https://mobilizon.fr/@metacartes",
+    "startTime": "2018-02-12T14:08:20Z",
+    "cc": [
+      "https://framapiaf.org/users/admin/followers",
+      "https://framapiaf.org/users/tcit"
+    ],
+    "content": "<p><span class=\"h-card\"><a href=\"https://framapiaf.org/users/tcit\" class=\"u-url mention\">@<span>tcit</span></a></span></p>",
+    "category": "TODO remove me",
+    "id": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93",
+    "inReplyTo": null,
+    "location": {
+      "type": "Place",
+      "name": "Locaux de Framasoft",
+      "id": "https://event1.tcit.fr/address/eeecc11d-0030-43e8-a897-6422876372jd",
+      "address": {
+        "type": "PostalAddress",
+        "streetAddress": "10 Rue Jangot",
+        "postalCode": "69007",
+        "addressLocality": "Lyon",
+        "addressRegion": "Auvergne Rhône Alpes",
+        "addressCountry": "France"
+      }
+    },
+    "name": "My first event",
+    "published": "2018-02-12T14:08:20Z",
+    "tag": [
+      {
+        "href": "https://framapiaf.org/users/tcit",
+        "name": "@tcit@framapiaf.org",
+        "type": "Mention"
+      }
+    ],
+    "to": ["https://www.w3.org/ns/activitystreams#Public"],
+    "type": "Event",
+    "url": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93",
+    "uuid": "109ccdfd-ee3e-46e1-a877-6c228763df0c"
+  },
+  "published": "2018-02-12T14:08:20Z",
+  "to": ["https://www.w3.org/ns/activitystreams#Public"],
+  "type": "Create"
+}
diff --git a/test/fixtures/mobilizon-post-activity-media.json b/test/fixtures/mobilizon-post-activity-media.json
new file mode 100644
index 000000000..d6906f2e8
--- /dev/null
+++ b/test/fixtures/mobilizon-post-activity-media.json
@@ -0,0 +1,99 @@
+{
+  "@context": [
+    "https://www.w3.org/ns/activitystreams",
+    "https://litepub.social/litepub/context.jsonld",
+    {
+      "Hashtag": "as:Hashtag",
+      "category": "sc:category",
+      "ical": "http://www.w3.org/2002/12/cal/ical#",
+      "joinMode": {
+        "@id": "mz:joinMode",
+        "@type": "mz:joinModeType"
+      },
+      "joinModeType": {
+        "@id": "mz:joinModeType",
+        "@type": "rdfs:Class"
+      },
+      "maximumAttendeeCapacity": "sc:maximumAttendeeCapacity",
+      "mz": "https://joinmobilizon.org/ns#",
+      "repliesModerationOption": {
+        "@id": "mz:repliesModerationOption",
+        "@type": "mz:repliesModerationOptionType"
+      },
+      "repliesModerationOptionType": {
+        "@id": "mz:repliesModerationOptionType",
+        "@type": "rdfs:Class"
+      },
+      "sc": "http://schema.org#",
+      "uuid": "sc:identifier"
+    }
+  ],
+  "actor": "https://mobilizon.fr/@metacartes",
+  "cc": [
+    "https://framapiaf.org/users/admin/followers",
+    "https://framapiaf.org/users/tcit"
+  ],
+  "id": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93/activity",
+  "object": {
+    "attachment": [
+      {
+        "href": "https://something.org",
+        "mediaType": "text/html",
+        "name": "Another link",
+        "type": "Link"
+      },
+      {
+        "href": "https://google.com",
+        "mediaType": "text/html",
+        "name": "Website",
+        "type": "Link"
+      },
+      {
+        "type": "Document",
+        "mediaType": "image/png",
+        "url": "https://mobilizon.fr/some-image",
+        "name": null,
+        "blurhash": "U5SY?Z00nOxu7ORP.8-pU^kVS#NGXyxbMxM{"
+      }
+    ],
+    "attributedTo": "https://mobilizon.fr/@metacartes",
+    "startTime": "2018-02-12T14:08:20Z",
+    "cc": [
+      "https://framapiaf.org/users/admin/followers",
+      "https://framapiaf.org/users/tcit"
+    ],
+    "content": "<p><span class=\"h-card\"><a href=\"https://framapiaf.org/users/tcit\" class=\"u-url mention\">@<span>tcit</span></a></span></p>",
+    "category": "TODO remove me",
+    "id": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93",
+    "inReplyTo": null,
+    "location": {
+      "type": "Place",
+      "name": "Locaux de Framasoft",
+      "id": "https://event1.tcit.fr/address/eeecc11d-0030-43e8-a897-6422876372jd",
+      "address": {
+        "type": "PostalAddress",
+        "streetAddress": "10 Rue Jangot",
+        "postalCode": "69007",
+        "addressLocality": "Lyon",
+        "addressRegion": "Auvergne Rhône Alpes",
+        "addressCountry": "France"
+      }
+    },
+    "name": "My first event",
+    "published": "2018-02-12T14:08:20Z",
+    "tag": [
+      {
+        "href": "https://framapiaf.org/users/tcit",
+        "name": "@tcit@framapiaf.org",
+        "type": "Mention"
+      }
+    ],
+    "to": ["https://www.w3.org/ns/activitystreams#Public"],
+    "type": "Event",
+    "url": "https://mobilizon.fr/events/39a0c4a6-f2b6-41dc-bbe2-fc5bff76cc93",
+    "uuid": "109ccdfd-ee3e-46e1-a877-6c228763df0c"
+  },
+  "published": "2018-02-12T14:08:20Z",
+  "to": ["https://www.w3.org/ns/activitystreams#Public"],
+  "type": "Create"
+}