diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index 92645ff28..b377b7b4d 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -51,11 +51,13 @@ Rails.application.config.content_security_policy_nonce_generator = -> request {
 
 Rails.application.config.content_security_policy_nonce_directives = %w(style-src)
 
-PgHero::HomeController.content_security_policy do |p|
-  p.script_src :self, :unsafe_inline, assets_host
-  p.style_src  :self, :unsafe_inline, assets_host
-end
+Rails.application.reloader.to_prepare do
+  PgHero::HomeController.content_security_policy do |p|
+    p.script_src :self, :unsafe_inline, assets_host
+    p.style_src  :self, :unsafe_inline, assets_host
+  end
 
-PgHero::HomeController.after_action do
-  request.content_security_policy_nonce_generator = nil
+  PgHero::HomeController.after_action do
+    request.content_security_policy_nonce_generator = nil
+  end
 end
diff --git a/config/initializers/paperclip.rb b/config/initializers/paperclip.rb
index 9ad7fd814..e2a045647 100644
--- a/config/initializers/paperclip.rb
+++ b/config/initializers/paperclip.rb
@@ -112,7 +112,9 @@ else
   )
 end
 
-Paperclip.options[:content_type_mappings] = { csv: Import::FILE_TYPES }
+Rails.application.reloader.to_prepare do
+  Paperclip.options[:content_type_mappings] = { csv: Import::FILE_TYPES }
+end
 
 # In some places in the code, we rescue this exception, but we don't always
 # load the S3 library, so it may be an undefined constant:
diff --git a/config/initializers/suppress_csrf_warnings.rb b/config/initializers/suppress_csrf_warnings.rb
index 410ab585b..b86adc6f1 100644
--- a/config/initializers/suppress_csrf_warnings.rb
+++ b/config/initializers/suppress_csrf_warnings.rb
@@ -1,3 +1,5 @@
 # frozen_string_literal: true
 
-ActionController::Base.log_warning_on_csrf_failure = false
+Rails.application.reloader.to_prepare do
+  ActionController::Base.log_warning_on_csrf_failure = false
+end