diff --git a/Gemfile.lock b/Gemfile.lock
index 681b7f3..fcb0f66 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,12 +2,12 @@ GEM
   remote: https://rubygems.org/
   specs:
     RedCloth (4.2.9)
-    activesupport (4.1.8)
-      i18n (~> 0.6, >= 0.6.9)
-      json (~> 1.7, >= 1.7.7)
+    activesupport (6.0.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
-      thread_safe (~> 0.1)
       tzinfo (~> 1.1)
+      zeitwerk (~> 2.2)
     blankslate (2.1.2.4)
     celluloid (0.16.0)
       timers (~> 4.0.0)
@@ -18,6 +18,7 @@ GEM
       execjs
     coffee-script-source (1.8.0)
     colorator (0.1)
+    concurrent-ruby (1.1.5)
     execjs (2.2.2)
     fast-stemmer (1.0.2)
     ffi (1.9.6)
@@ -47,7 +48,8 @@ GEM
     html-pipeline (1.9.0)
       activesupport (>= 2)
       nokogiri (~> 1.4)
-    i18n (0.6.11)
+    i18n (1.7.0)
+      concurrent-ruby (~> 1.0)
     jekyll (2.4.0)
       classifier-reborn (~> 2.0)
       colorator (~> 0.1)
@@ -81,7 +83,6 @@ GEM
       gemoji (~> 2.0)
       html-pipeline (~> 1.9)
       jekyll (~> 2.0)
-    json (1.8.1)
     kramdown (1.3.1)
     liquid (2.6.1)
     listen (2.8.3)
@@ -91,7 +92,7 @@ GEM
     maruku (0.7.0)
     mercenary (0.3.5)
     mini_portile (0.6.1)
-    minitest (5.4.3)
+    minitest (5.13.0)
     net-dns (0.8.0)
     nokogiri (1.6.5)
       mini_portile (~> 0.6.0)
@@ -110,14 +111,15 @@ GEM
     safe_yaml (1.0.4)
     sass (3.4.9)
     terminal-table (1.4.5)
-    thread_safe (0.3.4)
+    thread_safe (0.3.6)
     timers (4.0.1)
       hitimes
     toml (0.1.2)
       parslet (~> 1.5.0)
-    tzinfo (1.2.2)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
     yajl-ruby (1.1.0)
+    zeitwerk (2.2.1)
 
 PLATFORMS
   ruby