diff --git a/app/serializers/rest/instance_serializer.rb b/app/serializers/rest/instance_serializer.rb
index e7d4a646d4644b..26a9d24b1d1ff9 100644
--- a/app/serializers/rest/instance_serializer.rb
+++ b/app/serializers/rest/instance_serializer.rb
@@ -73,6 +73,7 @@ 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 c6cbaba4898007..b3a0d734fc158b 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,