diff --git a/lib/pleroma/formatter.ex b/lib/pleroma/formatter.ex
index dab8910c1..0ec6bcee0 100644
--- a/lib/pleroma/formatter.ex
+++ b/lib/pleroma/formatter.ex
@@ -113,9 +113,7 @@ def emojify(text, emoji, strip \\ false) do
 
       html =
         if not strip do
-          "<img height='32px' width='32px' alt='#{emoji}' title='#{emoji}' src='#{
-            MediaProxy.url(file)
-          }' />"
+          "<img class='emoji' alt='#{emoji}' title='#{emoji}' src='#{MediaProxy.url(file)}' />"
         else
           ""
         end
diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index 726c370ad..d1da746de 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -151,6 +151,7 @@ defmodule Pleroma.HTML.Scrubber.TwitterText do
     Meta.allow_tag_with_these_attributes("img", [
       "width",
       "height",
+      "class",
       "title",
       "alt"
     ])
@@ -221,6 +222,7 @@ defmodule Pleroma.HTML.Scrubber.Default do
     Meta.allow_tag_with_these_attributes("img", [
       "width",
       "height",
+      "class",
       "title",
       "alt"
     ])
diff --git a/test/formatter_test.exs b/test/formatter_test.exs
index fdaf29742..06f4f6e50 100644
--- a/test/formatter_test.exs
+++ b/test/formatter_test.exs
@@ -248,7 +248,7 @@ test "it adds cool emoji" do
     text = "I love :firefox:"
 
     expected_result =
-      "I love <img height=\"32px\" width=\"32px\" alt=\"firefox\" title=\"firefox\" src=\"/emoji/Firefox.gif\" />"
+      "I love <img class=\"emoji\" alt=\"firefox\" title=\"firefox\" src=\"/emoji/Firefox.gif\" />"
 
     assert Formatter.emojify(text) == expected_result
   end
@@ -263,7 +263,7 @@ test "it does not add XSS emoji" do
     }
 
     expected_result =
-      "I love <img height=\"32px\" width=\"32px\" alt=\"\" title=\"\" src=\"https://placehold.it/1x1\" />"
+      "I love <img class=\"emoji\" alt=\"\" title=\"\" src=\"https://placehold.it/1x1\" />"
 
     assert Formatter.emojify(text, custom_emoji) == expected_result
   end
diff --git a/test/web/twitter_api/views/activity_view_test.exs b/test/web/twitter_api/views/activity_view_test.exs
index 85815ba7e..1aa533b48 100644
--- a/test/web/twitter_api/views/activity_view_test.exs
+++ b/test/web/twitter_api/views/activity_view_test.exs
@@ -100,7 +100,7 @@ test "a create activity with a summary containing emoji" do
     expected = ":firefox: meow"
 
     expected_html =
-      "<img height=\"32px\" width=\"32px\" alt=\"firefox\" title=\"firefox\" src=\"http://localhost:4001/emoji/Firefox.gif\" /> meow"
+      "<img class=\"emoji\" alt=\"firefox\" title=\"firefox\" src=\"http://localhost:4001/emoji/Firefox.gif\" /> meow"
 
     assert result["summary"] == expected
     assert result["summary_html"] == expected_html
diff --git a/test/web/twitter_api/views/user_view_test.exs b/test/web/twitter_api/views/user_view_test.exs
index c99dbddeb..74526673c 100644
--- a/test/web/twitter_api/views/user_view_test.exs
+++ b/test/web/twitter_api/views/user_view_test.exs
@@ -32,7 +32,7 @@ test "A user with an avatar object", %{user: user} do
 
   test "A user with emoji in username" do
     expected =
-      "<img height=\"32px\" width=\"32px\" alt=\"karjalanpiirakka\" title=\"karjalanpiirakka\" src=\"/file.png\" /> man"
+      "<img class=\"emoji\" alt=\"karjalanpiirakka\" title=\"karjalanpiirakka\" src=\"/file.png\" /> man"
 
     user =
       insert(:user, %{