diff --git a/Gemfile b/Gemfile
index fa75df1..a8c5063 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,9 @@
 source 'https://rubygems.org'
 
 gemspec
+
+group :guard do
+  gem 'guard'
+  gem 'guard-bundler'
+  gem 'guard-rspec'
+end
diff --git a/Gemfile.lock b/Gemfile.lock
index 3b74c36..0101495 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,25 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    coderay (1.0.8)
     diff-lcs (1.1.3)
+    guard (1.5.4)
+      listen (>= 0.4.2)
+      lumberjack (>= 1.0.2)
+      pry (>= 0.9.10)
+      thor (>= 0.14.6)
+    guard-bundler (1.0.0)
+      bundler (~> 1.0)
+      guard (~> 1.1)
+    guard-rspec (1.2.1)
+      guard (>= 1.1)
+    listen (0.5.3)
+    lumberjack (1.0.2)
+    method_source (0.8.1)
+    pry (0.9.10)
+      coderay (~> 1.0.5)
+      method_source (~> 0.8)
+      slop (~> 3.3.1)
     rack (1.4.1)
     rspec (2.11.0)
       rspec-core (~> 2.11.0)
@@ -17,12 +35,16 @@ GEM
     rspec-expectations (2.11.3)
       diff-lcs (~> 1.1.3)
     rspec-mocks (2.11.3)
+    slop (3.3.3)
     thor (0.16.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  guard
+  guard-bundler
+  guard-rspec
   rspec
   thor
   zero!