diff --git a/app/serializers/rest/instance_serializer.rb b/app/serializers/rest/instance_serializer.rb
index cc557023ba5540..a07c791a64e4ec 100644
--- a/app/serializers/rest/instance_serializer.rb
+++ b/app/serializers/rest/instance_serializer.rb
@@ -74,6 +74,7 @@ def configuration
       },
 
       polls: {
+        allow_media: true,
         max_options: PollValidator::MAX_OPTIONS,
         max_characters_per_option: PollValidator::MAX_OPTION_CHARS,
         min_expiration: PollValidator::MIN_EXPIRATION,
diff --git a/app/serializers/rest/v1/instance_serializer.rb b/app/serializers/rest/v1/instance_serializer.rb
index 69ffaa346f9c43..78c47e64e1dd50 100644
--- a/app/serializers/rest/v1/instance_serializer.rb
+++ b/app/serializers/rest/v1/instance_serializer.rb
@@ -92,6 +92,7 @@ def configuration
       },
 
       polls: {
+        allow_media: true,
         max_options: PollValidator::MAX_OPTIONS,
         max_characters_per_option: PollValidator::MAX_OPTION_CHARS,
         min_expiration: PollValidator::MIN_EXPIRATION,