diff --git a/app/models/concerns/account_avatar.rb b/app/models/concerns/account_avatar.rb
index a6527a85b..b0ec689a7 100644
--- a/app/models/concerns/account_avatar.rb
+++ b/app/models/concerns/account_avatar.rb
@@ -8,7 +8,7 @@ module AccountAvatar
   class_methods do
     def avatar_styles(file)
       styles = { original: '120x120#' }
-      styles[:static] = { format: 'png' } if file.content_type == 'image/gif'
+      styles[:static] = { animated: false } if file.content_type == 'image/gif'
       styles
     end
 
diff --git a/app/models/concerns/account_header.rb b/app/models/concerns/account_header.rb
index 4ba9212a2..542e25abe 100644
--- a/app/models/concerns/account_header.rb
+++ b/app/models/concerns/account_header.rb
@@ -8,7 +8,7 @@ module AccountHeader
   class_methods do
     def header_styles(file)
       styles = { original: '700x335#' }
-      styles[:static] = { format: 'png' } if file.content_type == 'image/gif'
+      styles[:static] = { animated: false } if file.content_type == 'image/gif'
       styles
     end