diff --git a/fly-dev.toml b/fly-dev.toml
index 6329d6d..8944e60 100644
--- a/fly-dev.toml
+++ b/fly-dev.toml
@@ -15,7 +15,7 @@ kill_signal = "SIGTERM"
   DATABASE_PATH = "/app/swapi.db"
   PHX_HOST = "swapi-dev.profiq.com"
   PORT = "8080"
-  CHECK_ORIGIN = '["swapi-dev.profiq.com", "swapi-elixir-dev.fly.dev"]'
+  CHECK_ORIGIN = '["//swapi-dev.profiq.com", "//swapi-elixir-dev.fly.dev"]'
 
 [http_service]
   internal_port = 8080
diff --git a/fly.toml b/fly.toml
index 9d4f776..8e11183 100644
--- a/fly.toml
+++ b/fly.toml
@@ -15,7 +15,7 @@ kill_signal = "SIGTERM"
   DATABASE_PATH = "/app/swapi.db"
   PHX_HOST = "swapi.profiq.com"
   PORT = "8080"
-  CHECK_ORIGIN = '["swapi.profiq.com", "swapi-elixir.fly.dev"]'
+  CHECK_ORIGIN = '["//swapi.profiq.com", "//swapi-elixir.fly.dev"]'
 
 [http_service]
   internal_port = 8080