diff --git a/Gemfile b/Gemfile
index 1a81efd..2841d5b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ git_source(:github) do |repo_name|
 end
 gem 'addressable', '~> 2.5.2'
 gem 'csv'
-gem 'json', '~> 2.4.0'
+gem 'json', '~> 2.3.0'
 gem "nokogiri", ">= 1.11.0"
 gem 'rest-client'
 gem 'rubocop', '~> 0.51.0', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 24f9302..9fdf426 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,22 +12,24 @@ GEM
     hashdiff (0.3.7)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    json (2.1.0)
+    json (2.3.0)
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.5.0)
     netrc (0.11.0)
-    nokogiri (1.8.1)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.11.2)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     parallel (1.12.1)
     parser (2.4.0.2)
       ast (~> 2.3)
     powerpack (0.1.1)
     public_suffix (3.0.1)
+    racc (1.5.2)
     rainbow (2.2.2)
       rake
-    rake (12.3.0)
+    rake (13.0.3)
     rest-client (2.0.2)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
@@ -56,8 +58,9 @@ PLATFORMS
 DEPENDENCIES
   addressable (~> 2.5.2)
   csv
-  json (~> 2.1.0)
-  nokogiri
+  json (~> 2.3.0)
+  nokogiri (>= 1.11.0)
+  rake (>= 12.3.3)
   rest-client
   rubocop (~> 0.51.0)
   webmock