diff --git a/app/lib/activitypub/parser/media_attachment_parser.rb b/app/lib/activitypub/parser/media_attachment_parser.rb
index 30bea1f0e6f..656be84b73f 100644
--- a/app/lib/activitypub/parser/media_attachment_parser.rb
+++ b/app/lib/activitypub/parser/media_attachment_parser.rb
@@ -50,7 +50,7 @@ class ActivityPub::Parser::MediaAttachmentParser
     components = begin
       blurhash = @json['blurhash']
 
-      if blurhash.present? && /^[\w#$%*+-.:;=?@\[\]^{|}~]+$/.match?(blurhash)
+      if blurhash.present? && /^[\w#$%*+,-.:;=?@\[\]^{|}~]+$/.match?(blurhash)
         Blurhash.components(blurhash)
       end
     end