diff --git a/js/public/img/mobilizon_default_card.png b/js/public/img/mobilizon_default_card.png
new file mode 100644
index 000000000..8f9ccdf7c
Binary files /dev/null and b/js/public/img/mobilizon_default_card.png differ
diff --git a/js/src/components/Event/EventCard.vue b/js/src/components/Event/EventCard.vue
index faee46b0c..a79314186 100644
--- a/js/src/components/Event/EventCard.vue
+++ b/js/src/components/Event/EventCard.vue
@@ -28,13 +28,11 @@ A simple card for an event
 
 <template>
   <router-link class="card" :to="{ name: 'Event', params: { uuid: event.uuid } }">
-    <div class="card-image" v-if="!event.image">
-      <figure class="image is-16by9">
+    <div class="card-image">
+      <figure class="image is-16by9" :style="`background-image: url('${event.picture ? event.picture.url : '/img/mobilizon_default_card.png'}')`">
         <div class="tag-container" v-if="event.tags">
           <b-tag v-for="tag in event.tags.slice(0, 3)" :key="tag.slug" type="is-secondary">{{ tag.title }}</b-tag>
         </div>
-        <img v-if="event.picture" :src="event.picture.url" />
-        <img v-else src="https://picsum.photos/g/400/225/?random" />
       </figure>
     </div>
     <div class="content">
@@ -168,6 +166,11 @@ export default class EventCard extends Vue {
 
     div.card-image {
       background: $secondary;
+
+      figure.image {
+        background-size: cover;
+        background-position: center;
+      }
     }
 
     div.content {
diff --git a/js/src/components/PictureUpload.vue b/js/src/components/PictureUpload.vue
index 74bcfa7f7..ff36df43e 100644
--- a/js/src/components/PictureUpload.vue
+++ b/js/src/components/PictureUpload.vue
@@ -28,6 +28,7 @@
     margin-right: 30px;
     max-height: 200px;
     max-width: 200px;
+    overflow: hidden;
   }
 
   .image-placeholder {
diff --git a/js/src/types/picture.model.ts b/js/src/types/picture.model.ts
index 3670db29f..bee30a57d 100644
--- a/js/src/types/picture.model.ts
+++ b/js/src/types/picture.model.ts
@@ -1,4 +1,5 @@
 export interface IPicture {
+  id: string;
   url: string;
   name: string;
   alt: string;
diff --git a/js/src/views/Event/Edit.vue b/js/src/views/Event/Edit.vue
index 11d583c3b..173207946 100644
--- a/js/src/views/Event/Edit.vue
+++ b/js/src/views/Event/Edit.vue
@@ -259,7 +259,7 @@ import TagInput from '@/components/Event/TagInput.vue';
 import { TAGS } from '@/graphql/tags';
 import { ITag } from '@/types/tag.model';
 import AddressAutoComplete from '@/components/Event/AddressAutoComplete.vue';
-import { buildFileFromIPicture, buildFileVariable } from '@/utils/image';
+import { buildFileFromIPicture, buildFileVariable, readFileAsync } from '@/utils/image';
 import IdentityPickerWrapper from '@/views/Account/IdentityPickerWrapper.vue';
 import { RouteName } from '@/router';
 
@@ -377,10 +377,12 @@ export default class EditEvent extends Vue {
   }
 
   async createEvent() {
+    const variables = await this.buildVariables();
+
     try {
       const { data } = await this.$apollo.mutate({
         mutation: CREATE_EVENT,
-        variables: this.buildVariables(),
+        variables,
         update: (store, { data: { createEvent } }) => this.postCreateOrUpdate(store, createEvent),
         refetchQueries: ({ data: { createEvent } }) => this.postRefetchQueries(createEvent),
       });
@@ -403,10 +405,12 @@ export default class EditEvent extends Vue {
   }
 
   async updateEvent() {
+    const variables = await this.buildVariables();
+
     try {
       await this.$apollo.mutate({
         mutation: EDIT_EVENT,
-        variables: this.buildVariables(),
+        variables,
         update: (store, { data: { updateEvent } }) => this.postCreateOrUpdate(store, updateEvent),
         refetchQueries: ({ data: { updateEvent } }) => this.postRefetchQueries(updateEvent),
       });
@@ -489,7 +493,7 @@ export default class EditEvent extends Vue {
   /**
    * Build variables for Event GraphQL creation query
    */
-  private buildVariables() {
+  private async buildVariables() {
     let res = this.event.toEditJSON();
     if (this.event.organizerActor) {
       res = Object.assign(res, { organizerActorId: this.event.organizerActor.id });
@@ -502,8 +506,17 @@ export default class EditEvent extends Vue {
     }
 
     const pictureObj = buildFileVariable(this.pictureFile, 'picture');
+    res = Object.assign({}, res, pictureObj);
 
-    return Object.assign({}, res, pictureObj);
+    if (this.event.picture) {
+      const oldPictureFile = await buildFileFromIPicture(this.event.picture) as File;
+      const oldPictureFileContent = await readFileAsync(oldPictureFile);
+      const newPictureFileContent = await readFileAsync(this.pictureFile as File);
+      if (oldPictureFileContent === newPictureFileContent) {
+        res.picture = { pictureId: this.event.picture.id };
+      }
+    }
+    return res;
   }
 
   private async getEvent() {
diff --git a/js/src/views/Event/Event.vue b/js/src/views/Event/Event.vue
index 040e2cf83..d09b5bf85 100644
--- a/js/src/views/Event/Event.vue
+++ b/js/src/views/Event/Event.vue
@@ -4,14 +4,8 @@ import {ParticipantRole} from "@/types/event.model";
     <b-loading :active.sync="$apollo.loading"></b-loading>
     <transition appear name="fade" mode="out-in">
       <div v-if="event">
-        <div class="header-picture" :style="`background-image: url('${event.picture ? event.picture.url : 'https://picsum.photos/600/200/'}')`">
-          <!--<figure class="image is-3by1" v-if="event.picture">
-            <img :src="event.picture.url">
-          </figure>
-          <figure class="image is-3by1" v-else>
-            <img src="https://picsum.photos/600/200/">
-          </figure>-->
-        </div>
+        <div class="header-picture" v-if="event.picture" :style="`background-image: url('${event.picture.url}')`" />
+        <div class="header-picture-default" v-else />
           <section>
             <div class="title-and-participate-button">
               <div class="title-wrapper">
@@ -552,14 +546,17 @@ export default class Event extends EventMixin {
     opacity: 0;
   }
 
-  .header-picture {
+  .header-picture, .header-picture-default {
     height: 400px;
     background-size: cover;
-    // background-position: center center;
-    background-attachment: fixed;
+    background-position: center;
     background-repeat: no-repeat;
   }
 
+  .header-picture-default {
+    background-image: url('/img/mobilizon_default_card.png');
+  }
+
   div.sidebar {
     display: flex;
     flex-wrap: wrap;
diff --git a/lib/mobilizon_web/schema/picture.ex b/lib/mobilizon_web/schema/picture.ex
index e241ace92..5290505d5 100644
--- a/lib/mobilizon_web/schema/picture.ex
+++ b/lib/mobilizon_web/schema/picture.ex
@@ -20,7 +20,7 @@ defmodule MobilizonWeb.Schema.PictureType do
     # Either a full picture object
     field(:picture, :picture_input_object)
     # Or directly the ID of an existing picture
-    field(:picture_id, :string)
+    field(:picture_id, :id)
   end
 
   @desc "An attached picture"
diff --git a/lib/service/activity_pub/utils.ex b/lib/service/activity_pub/utils.ex
index 397e8dceb..5b87eafa0 100644
--- a/lib/service/activity_pub/utils.ex
+++ b/lib/service/activity_pub/utils.ex
@@ -261,6 +261,7 @@ defmodule Mobilizon.Service.ActivityPub.Utils do
   def make_picture_data(picture) when is_map(picture) do
     with {:ok, %{"url" => [%{"href" => url, "mediaType" => content_type}], "size" => size}} <-
            MobilizonWeb.Upload.store(picture.file),
+         {:picture_exists, nil} <- {:picture_exists, Mobilizon.Media.get_picture_by_url(url)},
          {:ok, %Picture{file: _file} = picture} <-
            Mobilizon.Media.create_picture(%{
              "file" => %{
@@ -272,6 +273,12 @@ defmodule Mobilizon.Service.ActivityPub.Utils do
              "actor_id" => picture.actor_id
            }) do
       Converter.Picture.model_to_as(picture)
+    else
+      {:picture_exists, %Picture{file: _file} = picture} ->
+        Converter.Picture.model_to_as(picture)
+
+      err ->
+        err
     end
   end
 
diff --git a/schema.graphql b/schema.graphql
index 9cacfb2e7..cb28dcb8b 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -1,5 +1,5 @@
 # source: http://localhost:4000/api
-# timestamp: Fri Oct 11 2019 11:53:52 GMT+0200 (Central European Summer Time)
+# timestamp: Mon Oct 14 2019 10:27:57 GMT+0200 (Central European Summer Time)
 
 schema {
   query: RootQueryType
@@ -796,7 +796,7 @@ type Picture {
 """An attached picture or a link to a picture"""
 input PictureInput {
   picture: PictureInputObject
-  pictureId: String
+  pictureId: ID
 }
 
 """An attached picture"""