diff --git a/Gemfile b/Gemfile
index 1a0968b..60e37b0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source 'http://rubygems.org'
 
 gem 'rspec-core', '>= 3.0.3'
 gem 'rouge', '1.6.1'
-gem 'activesupport', '>= 4.1.4'
+gem 'activesupport', '>= 5.2.4.3'
 
 # Add dependencies to develop your gem here.
 # Include everything needed to run rake, tests, features, etc.
diff --git a/Gemfile.lock b/Gemfile.lock
index f8bbf4a..a57ffa1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,14 +1,14 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (4.1.4)
-      i18n (~> 0.6, >= 0.6.9)
-      json (~> 1.7, >= 1.7.7)
+    activesupport (5.2.4.3)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
-      thread_safe (~> 0.1)
       tzinfo (~> 1.1)
     addressable (2.3.6)
     builder (3.2.2)
+    concurrent-ruby (1.1.6)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     diff-lcs (1.2.5)
@@ -29,7 +29,8 @@ GEM
       oauth2
     hashie (3.2.0)
     highline (1.6.21)
-    i18n (0.6.11)
+    i18n (1.8.2)
+      concurrent-ruby (~> 1.0)
     jeweler (2.0.1)
       builder
       bundler (>= 1.0)
@@ -39,10 +40,10 @@ GEM
       nokogiri (>= 1.5.10)
       rake
       rdoc
-    json (1.8.1)
+    json (1.8.6)
     jwt (1.0.0)
     mini_portile (0.6.0)
-    minitest (5.4.0)
+    minitest (5.14.1)
     multi_json (1.10.1)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
@@ -73,11 +74,11 @@ GEM
     rspec-mocks (3.0.3)
       rspec-support (~> 3.0.0)
     rspec-support (3.0.3)
-    thread_safe (0.3.4)
+    thread_safe (0.3.6)
     turnip (2.1.1)
       gherkin (~> 2.5)
       rspec (>= 3.0, < 4.0)
-    tzinfo (1.2.1)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
 
 PLATFORMS
@@ -85,7 +86,7 @@ PLATFORMS
   x86-mingw32
 
 DEPENDENCIES
-  activesupport (>= 4.1.4)
+  activesupport (>= 5.2.4.3)
   bundler (~> 1.0)
   jeweler (~> 2.0.1)
   rdoc (~> 3.12)
@@ -95,4 +96,4 @@ DEPENDENCIES
   turnip (~> 2.0, >= 2.0.2)
 
 BUNDLED WITH
-   1.16.4
+   1.17.3