diff --git a/.gitignore b/.gitignore
index 29521b0..762e32b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /spec.html
 Gemfile.lock
 /.rbx/
+/.byebug_history
diff --git a/.travis.yml b/.travis.yml
index 9e1f468..80f381d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,15 @@
 language: ruby
 bundler_args: --without debug
 script: "bundle exec rspec spec"
+before_install: "gem update --system"
+
 env:
   - CI=true
 rvm:
   - 2.2
   - 2.3
   - 2.4
+  - 2.5
   - jruby-9
   - rbx-3
 cache: bundler
diff --git a/Gemfile b/Gemfile
index dbb1d09..6e29b8e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,8 +14,3 @@ end
 group :debug do
   gem "byebug", platform: :mri
 end
-
-platforms :rbx do
-  gem 'rubysl', '~> 2.0'
-  gem 'rubinius', '~> 2.0'
-end
diff --git a/README.md b/README.md
index 765a8a0..ad96fc4 100755
--- a/README.md
+++ b/README.md
@@ -84,7 +84,7 @@ http://www.w3.org/2000/10/swap/grammar/n3.n3 (along with bnf-rules.n3) using cwm
 * Create equivalent to `--think` to iterate on solutions.
 
 ## Dependencies
-* [RDF.rb](http://rubygems.org/gems/rdf) (>= 2.0)
+* [RDF.rb](http://rubygems.org/gems/rdf) (>= 3.0)
 
 ## Documentation
 Full documentation available on [RubyDoc.info](http://rubydoc.info/github/ruby-rdf/rdf-n3/frames)
diff --git a/VERSION b/VERSION
index ccbccc3..4a36342 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.0
+3.0.0
diff --git a/example-files/back-slash.nt b/example-files/back-slash.nt
new file mode 100644
index 0000000..fb69dc2
--- /dev/null
+++ b/example-files/back-slash.nt
@@ -0,0 +1,2 @@
+<a> <b> "string with \\ char" .
+<a> <b> "string with \\ char\n" .
diff --git a/lib/rdf/n3/writer.rb b/lib/rdf/n3/writer.rb
index 0225cce..4517841 100644
--- a/lib/rdf/n3/writer.rb
+++ b/lib/rdf/n3/writer.rb
@@ -400,7 +400,7 @@ def reset
     # @return [String]
     def quoted(string)
       if string.to_s.match(/[\t\n\r]/)
-        string = string.gsub('\\', '\\\\').gsub('"""', '\\"""')
+        string = string.gsub('\\', '\\\\\\\\').gsub('"""', '\\"""')
         %("""#{string}""")
       else
         "\"#{escaped(string)}\""
diff --git a/rdf-n3.gemspec b/rdf-n3.gemspec
index c6642b4..7f5666b 100755
--- a/rdf-n3.gemspec
+++ b/rdf-n3.gemspec
@@ -22,18 +22,15 @@ Gem::Specification.new do |gem|
   gem.required_ruby_version = '>= 2.2.2'
   gem.requirements          = []
 
-  #gem.add_dependency             'rdf',             '~> 2.0'
-  gem.add_runtime_dependency     'rdf',             '>= 2.2', '< 4.0'
+  gem.add_dependency             'rdf',             '~> 3.0'
   gem.add_development_dependency 'open-uri-cached', '~> 0.0', '>= 0.0.5'
-  #gem.add_development_dependency 'json-ld',         '~> 2.0'
-  gem.add_development_dependency 'json-ld',         '>= 2.1', '< 4.0'
-  gem.add_development_dependency 'rspec',           '~> 3.4'
+  #gem.add_development_dependency 'json-ld',         '~> 3.0'
+  gem.add_development_dependency 'json-ld',         '>= 2.2', '< 4.0'
+  gem.add_development_dependency 'rspec',           '~> 3.7'
   gem.add_development_dependency 'rspec-its',       '~> 1.2'
-  #gem.add_development_dependency 'rdf-spec',        '~> 2.0'
-  #gem.add_development_dependency 'rdf-isomorphic',  '~> 2.0'
-  gem.add_development_dependency 'rdf-spec',        '>= 2.2', '< 4.0'
-  gem.add_development_dependency 'rdf-isomorphic',  '>= 2.0', '< 4.0'
-  gem.add_development_dependency 'yard' ,           '~> 0.8'
+  gem.add_development_dependency 'rdf-spec',        '~> 3.0'
+  gem.add_development_dependency 'rdf-isomorphic',  '~> 3.0'
+  gem.add_development_dependency 'yard' ,           '~> 0.9.12'
 
   gem.post_install_message  = nil
 end
diff --git a/script/parse b/script/parse
index 182a07a..7736049 100755
--- a/script/parse
+++ b/script/parse
@@ -5,8 +5,6 @@ require "bundler/setup"
 require 'logger'
 require 'rdf/n3'
 require 'rdf/ntriples'
-require 'rdf/rdfxml'
-require 'rdf/rdfa'
 require 'getoptlong'
 require 'open-uri'
 
diff --git a/spec/writer_spec.rb b/spec/writer_spec.rb
index 8ccc644..c1135fa 100644
--- a/spec/writer_spec.rb
+++ b/spec/writer_spec.rb
@@ -279,6 +279,17 @@
         n3 = %(:a :b """string with " escaped quote marks""" .)
         serialize(n3, nil, [/string with \\" escaped quote mark/])
       end
+
+      it "encodes embedded \\" do
+        n3 = %(:a :b """string with \\\\ escaped quote marks""" .)
+        serialize(n3, nil, [/string with \\\\ escaped quote mark/])
+      end
+
+      it "encodes embedded \\ multi-line" do
+        n3 = %(:a :b """string with \\\\ escaped quote marks
+  """ .)
+        serialize(n3, nil, [/string with \\\\ escaped quote mark/])
+      end
     end
     
     describe "with language" do