diff --git a/Gemfile b/Gemfile
index 345bbe8..d4f3cd6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@
 
 source 'https://rubygems.org'
 
-ruby '2.3.3'
+ruby '2.4.4'
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}.git" }
 
diff --git a/Gemfile.lock b/Gemfile.lock
index c4e6f80..b00c968 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,7 +50,7 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
+    addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
     ast (2.4.0)
     coderay (1.1.2)
@@ -61,51 +61,53 @@ GEM
     execjs (2.7.0)
     field_serializer (0.3.0)
     git (1.3.0)
-    hashdiff (0.3.7)
+    hashdiff (0.3.8)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
     httpclient (2.8.3)
-    method_source (0.9.0)
-    mime-types (3.1)
+    jaro_winkler (1.5.2)
+    method_source (0.9.2)
+    mime-types (3.2.2)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    mini_portile2 (2.3.0)
+    mime-types-data (3.2018.0812)
+    mini_portile2 (2.4.0)
     minispec-metadata (2.0.0)
       minitest
     minitest (5.11.3)
-    minitest-around (0.4.1)
+    minitest-around (0.5.0)
       minitest (~> 5.0)
     minitest-vcr (1.4.0)
       minispec-metadata (~> 2.0)
       minitest (>= 4.7.5)
       vcr (>= 2.9)
     netrc (0.11.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.10.1)
+      mini_portile2 (~> 2.4.0)
     open-uri-cached (0.0.5)
-    parallel (1.12.1)
-    parser (2.5.1.0)
+    parallel (1.13.0)
+    parser (2.6.0.0)
       ast (~> 2.4.0)
-    powerpack (0.1.1)
-    pry (0.11.3)
+    powerpack (0.1.2)
+    pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.2)
+    public_suffix (3.0.3)
     rainbow (3.0.0)
-    rake (12.3.1)
+    rake (12.3.2)
     require_all (2.0.0)
     rest-client (2.0.2)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rubocop (0.56.0)
+    rubocop (0.63.1)
+      jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.5)
+      parser (>= 2.5, != 2.5.1.1)
       powerpack (~> 0.1)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-progressbar (1.9.0)
+      unicode-display_width (~> 1.4.0)
+    ruby-progressbar (1.10.0)
     safe_yaml (1.0.4)
     sqlite3 (1.3.13)
     sqlite_magic (0.0.6)
@@ -113,7 +115,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.5)
-    unicode-display_width (1.3.3)
+    unicode-display_width (1.4.1)
     vcr (3.0.3)
     vcr-archive (0.3.0)
       vcr (~> 3.0.2)
@@ -147,7 +149,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 2.3.3p222
+   ruby 2.4.4p296
 
 BUNDLED WITH
-   1.16.0
+   1.16.5