diff --git a/app/models/glossary_category.rb b/app/models/glossary_category.rb
index b48306a..43bbade 100644
--- a/app/models/glossary_category.rb
+++ b/app/models/glossary_category.rb
@@ -1,3 +1,4 @@
 class GlossaryCategory < ActiveRecord::Base
   has_many :terms, class_name: 'GlossaryTerm', foreign_key: 'category_id'
+  belongs_to :project
 end
diff --git a/app/models/glossary_term.rb b/app/models/glossary_term.rb
index 645b6f0..fd087b3 100644
--- a/app/models/glossary_term.rb
+++ b/app/models/glossary_term.rb
@@ -1,3 +1,4 @@
 class GlossaryTerm < ActiveRecord::Base
   belongs_to :category, class_name: 'GlossaryCategory', foreign_key: 'category_id'
+  belongs_to :project
 end
diff --git a/db/migrate/004_add_project_to_terms_and_categories.rb b/db/migrate/004_add_project_to_terms_and_categories.rb
new file mode 100644
index 0000000..295e2c5
--- /dev/null
+++ b/db/migrate/004_add_project_to_terms_and_categories.rb
@@ -0,0 +1,6 @@
+class AddProjectToTermsAndCategories < ActiveRecord::Migration[5.1]
+  def change
+    add_reference :glossary_terms, :project, foreign_key: true
+    add_reference :glossary_categories, :project, foreign_key: true
+  end
+end