diff --git a/lib/quby/compiler/instance.rb b/lib/quby/compiler/instance.rb
index 104be626c3f6ed825d9ea11aa76f3e86306aba27..2939c60194dc005998cee410b1379138fc400891 100644
--- a/lib/quby/compiler/instance.rb
+++ b/lib/quby/compiler/instance.rb
@@ -36,7 +36,7 @@ module Quby
             roqua: Output.new(
               key: :roqua,
               filename: "roqua.json",
-              content: Outputs::RoquaSerializer.new(questionnaire).to_json,
+              content: JSON.pretty_generate(Outputs::RoquaSerializer.new(questionnaire).as_json)
             ),
             seeds: Output.new(
               key: :seeds,
@@ -46,12 +46,12 @@ module Quby
             quby_frontend_v1: Output.new(
               key: :quby_frontend_v1,
               filename: "quby-frontend-v1.json",
-              content: Outputs::QubyFrontendV1Serializer.new(questionnaire).to_json,
+              content: JSON.pretty_generate(Outputs::QubyFrontendV1Serializer.new(questionnaire).as_json),
             ),
             quby_frontend_v2: Output.new(
               key: :quby_frontend_v2,
               filename: "quby-frontend-v2.json",
-              content: Outputs::QubyFrontendV2Serializer.new(questionnaire).to_json,
+              content: JSON.pretty_generate(Outputs::QubyFrontendV2Serializer.new(questionnaire).as_json),
             ),
           },
         }