diff --git a/config/environments/development.rb b/config/environments/development.rb
index 47a5d160..1db15c06 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -76,4 +76,7 @@
 
   # Uncomment if you wish to allow Action Cable access from any origin.
   # config.action_cable.disable_request_forgery_protection = true
+
+  # Allow POST authenticity on Codespaces in dev
+  config.action_controller.forgery_protection_origin_check = false
 end