diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8fdf7b03..bb19b893f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -78,6 +78,7 @@ and releases in Jupiter project adheres to [Semantic Versioning](http://semver.o
 - Fixed flapping announcement tests [#1915](https://github.com/ualbertalib/jupiter/issues/1915)
 - Fixed not being able to clear a community logo [#2009](https://github.com/ualbertalib/jupiter/issues/2009)
 - Fixed getting an error when deleting an item [#2009](https://github.com/ualbertalib/jupiter/issues/2009)
+- bump rubocop and fix cop violations [PR#2019](https://github.com/ualbertalib/jupiter/pull/2019)
 
 ### Security
 - add `noopener noreferrer` when opening a link in a new tab [PR#1344](https://github.com/ualbertalib/jupiter/pull/1344)
diff --git a/Gemfile.lock b/Gemfile.lock
index 33f247cb8..faaf1b040 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -380,10 +380,10 @@ GEM
     rubocop-performance (1.9.1)
       rubocop (>= 0.90.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.8.1)
+    rubocop-rails (2.9.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 0.87.0)
+      rubocop (>= 0.90.0, < 2.0)
     ruby-progressbar (1.10.1)
     ruby-saml (1.11.0)
       nokogiri (>= 1.5.10)
diff --git a/app/models/concerns/draft_properties.rb b/app/models/concerns/draft_properties.rb
index 5f67c5694..1c1e8786f 100644
--- a/app/models/concerns/draft_properties.rb
+++ b/app/models/concerns/draft_properties.rb
@@ -22,7 +22,7 @@ module DraftProperties
     validates :files, presence: true, if: :validate_upload_files?
     validate :files_are_virus_free, if: :validate_upload_files?
 
-    scope :unpublished, -> { where(status: :active).where('uuid IS NULL') }
+    scope :unpublished, -> { where(status: :active).where(uuid: nil) }
 
     def communities
       return unless member_of_paths.present? && member_of_paths['community_id']