diff --git a/app/views/invitations/sheet.html.erb b/app/views/invitations/sheet.html.erb
index 2cfced5..277419a 100644
--- a/app/views/invitations/sheet.html.erb
+++ b/app/views/invitations/sheet.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024-2025 LibreWeddingPlanner contributors %>
+
<% invitations.each_slice(4) do |invitation_group| %>
<% invitation_group.each do |invitation| %>
diff --git a/app/views/layouts/pdf.html.erb b/app/views/layouts/pdf.html.erb
index f776a04..4d83e52 100644
--- a/app/views/layouts/pdf.html.erb
+++ b/app/views/layouts/pdf.html.erb
@@ -1,3 +1,5 @@
+<%# Copyright (C) 2024-2025 LibreWeddingPlanner contributors %>
+
diff --git a/config/initializers/wicked_pdf.rb b/config/initializers/wicked_pdf.rb
index f5566fb..749d3c3 100644
--- a/config/initializers/wicked_pdf.rb
+++ b/config/initializers/wicked_pdf.rb
@@ -1,3 +1,5 @@
+# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
+
# WickedPDF Global Configuration
#
# Use this to set up shared configuration options for your entire application.