diff --git a/Gemfile.lock b/Gemfile.lock
index 8886e19..dcf3d91 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,18 +2,18 @@ GEM
   remote: https://rubygems.org/
   specs:
     RedCloth (4.2.9)
-    activesupport (4.1.1)
-      i18n (~> 0.6, >= 0.6.9)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.1)
-      tzinfo (~> 1.1)
+    activesupport (7.0.4.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
     blankslate (2.1.2.4)
     classifier (1.3.4)
       fast-stemmer (>= 1.0.0)
     colorator (0.1)
     commander (4.1.6)
       highline (~> 1.6.11)
+    concurrent-ruby (1.1.10)
     fast-stemmer (1.0.2)
     ffi (1.9.3)
     gemoji (1.5.0)
@@ -33,7 +33,8 @@ GEM
     html-pipeline (1.5.0)
       activesupport (>= 2)
       nokogiri (~> 1.4)
-    i18n (0.6.9)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
     jekyll (1.5.1)
       classifier (~> 1.3)
       colorator (~> 0.1)
@@ -56,7 +57,6 @@ GEM
       gemoji (~> 1.5.0)
       html-pipeline (~> 1.5.0)
       jekyll (~> 1.4)
-    json (1.8.1)
     kramdown (1.3.1)
     liquid (2.5.5)
     listen (1.3.1)
@@ -65,7 +65,7 @@ GEM
       rb-kqueue (>= 0.2)
     maruku (0.7.0)
     mini_portile (0.6.0)
-    minitest (5.3.5)
+    minitest (5.17.0)
     nokogiri (1.6.2.1)
       mini_portile (= 0.6.0)
     parslet (1.5.0)
@@ -82,11 +82,10 @@ GEM
     rdiscount (2.1.7)
     redcarpet (2.3.0)
     safe_yaml (1.0.3)
-    thread_safe (0.3.4)
     toml (0.1.1)
       parslet (~> 1.5.0)
-    tzinfo (1.2.1)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     yajl-ruby (1.1.0)
 
 PLATFORMS