diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 1f15814..675fb13
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ ruby '~> 2'
 source 'https://rubygems.org/'
 
 gem 'combinatorics',  '~> 0.4.3'
-gem 'json', '~> 2.1.0'
+gem 'json', '~> 2.3.0'
 gem 'openssl', '~> 2'
 
 group :development do
diff --git a/Gemfile.lock b/Gemfile.lock
old mode 100755
new mode 100644
index e013b6f..86cda17
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,10 +1,11 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    base16 (0.0.2)
     combinatorics (0.4.3)
     diff-lcs (1.3)
     docile (1.1.5)
-    json (2.1.0)
+    json (2.3.0)
     openssl (2.0.3)
     rake (12.0.0)
     rspec (3.6.0)
@@ -32,8 +33,9 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  base16 (~> 0.0.2)
   combinatorics (~> 0.4.3)
-  json (~> 2.1.0)
+  json (~> 2.3.0)
   openssl (~> 2)
   rake (~> 12.0)
   rspec (~> 3.6)