diff --git a/.codeclimate.yml b/.codeclimate.yml
index 571507a54..9817d7f1c 100644
--- a/.codeclimate.yml
+++ b/.codeclimate.yml
@@ -27,10 +27,10 @@ plugins:
     enabled: true
   eslint:
     enabled: true
-    channel: eslint-5
+    channel: eslint-6
   rubocop:
     enabled: true
-    channel: rubocop-0-71
+    channel: rubocop-0-76
   sass-lint:
     enabled: true
 exclude_patterns:
diff --git a/.rubocop.yml b/.rubocop.yml
index 8bd4c867f..9a68becbb 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -71,6 +71,9 @@ Naming/MemoizedInstanceVariableName:
 Rails:
   Enabled: true
 
+Rails/EnumHash:
+  Enabled: false
+
 Rails/HasAndBelongsToMany:
   Enabled: false
 
@@ -102,6 +105,9 @@ Style/Documentation:
 Style/DoubleNegation:
   Enabled: true
 
+Style/FormatStringToken:
+  Enabled: false
+
 Style/FrozenStringLiteralComment:
   Enabled: true
 
diff --git a/app/lib/activitypub/adapter.rb b/app/lib/activitypub/adapter.rb
index 2a8f72333..78138fb73 100644
--- a/app/lib/activitypub/adapter.rb
+++ b/app/lib/activitypub/adapter.rb
@@ -35,6 +35,7 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
   def serializable_hash(options = nil)
     named_contexts     = {}
     context_extensions = {}
+
     options         = serialization_options(options)
     serialized_hash = serializer.serializable_hash(options.merge(named_contexts: named_contexts, context_extensions: context_extensions))
     serialized_hash = serialized_hash.select { |k, _| options[:fields].include?(k) } if options[:fields]
diff --git a/app/lib/language_detector.rb b/app/lib/language_detector.rb
index 6f9511a54..302072bcc 100644
--- a/app/lib/language_detector.rb
+++ b/app/lib/language_detector.rb
@@ -44,7 +44,7 @@ class LanguageDetector
     words = text.scan(RELIABLE_CHARACTERS_RE)
 
     if words.present?
-      words.reduce(0) { |acc, elem| acc + elem.size }.to_f / text.size.to_f > 0.3
+      words.reduce(0) { |acc, elem| acc + elem.size }.to_f / text.size > 0.3
     else
       false
     end
diff --git a/app/models/media_attachment.rb b/app/models/media_attachment.rb
index 1f9d92b22..5d5034a52 100644
--- a/app/models/media_attachment.rb
+++ b/app/models/media_attachment.rb
@@ -287,7 +287,7 @@ class MediaAttachment < ApplicationRecord
       width:  width,
       height: height,
       size: "#{width}x#{height}",
-      aspect: width.to_f / height.to_f,
+      aspect: width.to_f / height,
     }
   end
 
diff --git a/lib/paperclip/lazy_thumbnail.rb b/lib/paperclip/lazy_thumbnail.rb
index 542c17fb2..10b14860c 100644
--- a/lib/paperclip/lazy_thumbnail.rb
+++ b/lib/paperclip/lazy_thumbnail.rb
@@ -9,8 +9,8 @@ module Paperclip
         min_side = [@current_geometry.width, @current_geometry.height].min.to_i
         options[:geometry] = "#{min_side}x#{min_side}#" if @target_geometry.square? && min_side < @target_geometry.width
       elsif options[:pixels]
-        width  = Math.sqrt(options[:pixels] * (@current_geometry.width.to_f / @current_geometry.height.to_f)).round.to_i
-        height = Math.sqrt(options[:pixels] * (@current_geometry.height.to_f / @current_geometry.width.to_f)).round.to_i
+        width  = Math.sqrt(options[:pixels] * (@current_geometry.width.to_f / @current_geometry.height)).round.to_i
+        height = Math.sqrt(options[:pixels] * (@current_geometry.height.to_f / @current_geometry.width)).round.to_i
         options[:geometry] = "#{width}x#{height}>"
       end