diff --git a/2015-cis198-slides/Gemfile.lock b/2015-cis198-slides/Gemfile.lock
index 44d0a1f..779e1d2 100644
--- a/2015-cis198-slides/Gemfile.lock
+++ b/2015-cis198-slides/Gemfile.lock
@@ -2,12 +2,11 @@ GEM
   remote: https://rubygems.org/
   specs:
     RedCloth (4.2.9)
-    activesupport (4.2.5)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      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)
     addressable (2.3.8)
     blankslate (2.1.2.4)
     classifier-reborn (2.0.4)
@@ -17,6 +16,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     colorator (0.1)
+    concurrent-ruby (1.1.10)
     ethon (0.8.0)
       ffi (>= 1.3.0)
     execjs (2.6.0)
@@ -54,7 +54,8 @@ GEM
     html-pipeline (1.9.0)
       activesupport (>= 2)
       nokogiri (~> 1.4)
-    i18n (0.7.0)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
     jekyll (2.4.0)
       classifier-reborn (~> 2.0)
       colorator (~> 0.1)
@@ -90,7 +91,6 @@ GEM
       gemoji (~> 2.0)
       html-pipeline (~> 1.9)
       jekyll (>= 2.0)
-    json (1.8.3)
     kramdown (1.9.0)
     liquid (2.6.2)
     listen (3.0.5)
@@ -99,7 +99,7 @@ GEM
     maruku (0.7.0)
     mercenary (0.3.5)
     mini_portile2 (2.4.0)
-    minitest (5.8.3)
+    minitest (5.17.0)
     multipart-post (2.0.0)
     net-dns (0.8.0)
     nokogiri (1.10.8)
@@ -124,13 +124,12 @@ GEM
       addressable (~> 2.3.5)
       faraday (~> 0.8, < 0.10)
     terminal-table (1.5.2)
-    thread_safe (0.3.5)
     toml (0.1.2)
       parslet (~> 1.5.0)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     yajl-ruby (1.2.1)
 
 PLATFORMS