Gemfile.lock

GIT
  remote: git://github.com/sinatra/sinatra.git
  revision: 298466de07baa85a4aa01eb91145fa26c4342d55
  specs:
    sinatra (1.4.6)
      rack (~> 1.4)
      rack-protection (~> 1.4)
      tilt (>= 1.3, < 3)

PATH
  remote: .
  specs:
    sinatra-contrib (1.4.2)
      backports (>= 2.0)
      multi_json
      rack-protection
      rack-test
      sinatra (~> 1.4.0)
      tilt (>= 1.3, < 3)

GEM
  remote: https://rubygems.org/
  specs:
    RedCloth (4.2.9)
    asciidoctor (1.5.2)
    backports (3.6.4)
    builder (3.2.2)
    coffee-script (2.4.1)
      coffee-script-source
      execjs
    coffee-script-source (1.9.1.1)
    commonjs (0.2.7)
    creole (0.5.0)
    diff-lcs (1.2.5)
    erubis (2.7.0)
    execjs (2.5.2)
    expression_parser (0.9.0)
    haml (4.0.5)
      tilt
    htmlentities (4.3.3)
    json (1.8.2)
    less (2.6.0)
      commonjs (~> 0.2.7)
    libv8 (3.16.14.7)
    liquid (3.0.2)
    markaby (0.8.0)
      builder
    mini_portile (0.6.2)
    multi_json (1.10.0)
    nokogiri (1.6.6.2)
      mini_portile (~> 0.6.0)
    rack (1.5.2)
    rack-protection (1.5.3)
      rack
    rack-test (0.6.3)
      rack (>= 1.0)
    radius (0.7.4)
    rake (10.4.2)
    redcarpet (3.2.3)
    ref (1.0.5)
    rspec (2.99.0)
      rspec-core (~> 2.99.0)
      rspec-expectations (~> 2.99.0)
      rspec-mocks (~> 2.99.0)
    rspec-core (2.99.2)
    rspec-expectations (2.99.2)
      diff-lcs (>= 1.1.3, < 2.0)
    rspec-mocks (2.99.3)
    sass (3.4.13)
    slim (2.0.3)
      temple (~> 0.6.6)
      tilt (>= 1.3.3, < 2.1)
    temple (0.6.10)
    therubyracer (0.12.2)
      libv8 (~> 3.16.14.0)
      ref
    tilt (2.0.1)
    twitter-text (1.12.0)
      unf (~> 0.1.0)
    unf (0.1.4)
      unf_ext
    unf_ext (0.0.7.1)
    wikicloth (0.8.3)
      builder
      expression_parser
      htmlentities
      nokogiri
      twitter-text
    yajl-ruby (1.2.1)

PLATFORMS
  ruby

DEPENDENCIES
  RedCloth
  asciidoctor
  builder
  coffee-script
  creole
  erubis
  haml
  json
  less
  liquid
  markaby
  multi_json
  nokogiri
  rack
  radius
  rake
  redcarpet
  rspec (~> 2.3)
  sass
  sinatra!
  sinatra-contrib!
  slim (~> 2.0.2)
  therubyracer
  tilt
  wikicloth
  yajl-ruby

sinatra-contrib.gemspec.diff

diff --git a/sinatra-contrib.gemspec b/sinatra-contrib.gemspec
index 9ecc66e..7a7b632 100644
--- a/sinatra-contrib.gemspec
+++ b/sinatra-contrib.gemspec
@@ -196,7 +196,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rspec", "~> 2.3"
   s.add_development_dependency "haml"
   s.add_development_dependency "erubis"
-  s.add_development_dependency "slim"
+  s.add_development_dependency "slim", "~> 2.0.2"
   s.add_development_dependency "less"
   s.add_development_dependency "sass"
   s.add_development_dependency "therubyracer"