diff --git a/Gemfile b/Gemfile
index 7c5ce9d..7917dc1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,5 +7,5 @@ group :development, :test do
   gem 'guard'
   gem 'guard-rspec'
   gem 'vcr'
-  gem 'rubocop', '0.28.0', require: false
+  gem 'rubocop', '0.48.1', require: false
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 11d486b..7502a7b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,9 +3,7 @@ GEM
   specs:
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
-    ast (2.0.0)
-    astrolabe (1.3.0)
-      parser (>= 2.2.0.pre.3, < 3.0)
+    ast (2.4.2)
     coderay (1.0.8)
     coveralls (0.7.1)
       multi_json (~> 1.3)
@@ -30,15 +28,17 @@ GEM
     mime-types (2.3)
     multi_json (1.10.1)
     netrc (0.7.7)
-    parser (2.2.0.2)
-      ast (>= 1.1, < 3.0)
-    powerpack (0.0.9)
+    parser (2.7.2.0)
+      ast (~> 2.4.1)
+    powerpack (0.1.3)
     pry (0.9.10)
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.3.1)
     public_suffix (4.0.6)
-    rainbow (2.0.0)
+    rainbow (2.2.2)
+      rake
+    rake (13.0.6)
     rest-client (1.7.2)
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
@@ -50,13 +50,13 @@ GEM
     rspec-expectations (2.14.5)
       diff-lcs (>= 1.1.3, < 2.0)
     rspec-mocks (2.14.6)
-    rubocop (0.28.0)
-      astrolabe (~> 1.3)
-      parser (>= 2.2.0.pre.7, < 3.0)
-      powerpack (~> 0.0.6)
+    rubocop (0.48.1)
+      parser (>= 2.3.3.1, < 3.0)
+      powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
-      ruby-progressbar (~> 1.4)
-    ruby-progressbar (1.7.1)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (~> 1.0, >= 1.0.1)
+    ruby-progressbar (1.11.0)
     simplecov (0.9.1)
       docile (~> 1.1.0)
       multi_json (~> 1.0)
@@ -67,6 +67,7 @@ GEM
       tins (~> 1.0)
     thor (0.19.1)
     tins (1.3.3)
+    unicode-display_width (1.7.0)
     vcr (2.4.0)
     webmock (1.9.0)
       addressable (>= 2.2.7)
@@ -80,6 +81,6 @@ DEPENDENCIES
   guard
   guard-rspec
   rspec (~> 2.14.0)
-  rubocop (= 0.28.0)
+  rubocop (= 0.48.1)
   vcr
   webmock