diff --git a/.env.development b/.env.development
index 8f352f7e5f..15e09487f2 100644
--- a/.env.development
+++ b/.env.development
@@ -11,3 +11,9 @@ OFN_REDIS_URL="redis://localhost:6379/1"
 OFN_REDIS_JOBS_URL="redis://localhost:6379/2"
 
 SITE_URL="0.0.0.0:3000"
+
+# Deactivate rack-timeout in development.
+# https://github.com/zombocom/rack-timeout#configuring
+RACK_TIMEOUT_SERVICE_TIMEOUT="0"
+RACK_TIMEOUT_WAIT_TIMEOUT="0"
+RACK_TIMEOUT_WAIT_OVERTIME="0"
diff --git a/Gemfile b/Gemfile
index f3e2c8ca40..9b2e9ec007 100644
--- a/Gemfile
+++ b/Gemfile
@@ -92,6 +92,7 @@ gem 'gmaps4rails'
 gem 'mimemagic', '> 0.3.5'
 gem 'paper_trail', '~> 12.1'
 gem 'rack-rewrite'
+gem 'rack-timeout'
 gem 'roadie-rails'
 
 gem 'hiredis'
@@ -141,7 +142,6 @@ gem "private_address_check"
 
 group :production, :staging do
   gem 'ddtrace'
-  gem 'rack-timeout'
   gem 'sd_notify' # For better Systemd process management. Used by Puma.
 end