diff --git a/Gemfile b/Gemfile
index e29e26cdc833e..138f9d3114fca 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,8 +6,8 @@ gem "minima", "1.1.0"
 gem "kramdown", "1.11.1"
 gem "liquid", "3.0.6"
 gem "rouge", "1.11.1"
-gem "jemoji", "0.7.0"
-gem "jekyll-mentions", "1.2.0"
+gem "jemoji", "0.10.0"
+gem "jekyll-mentions", "1.4.0"
 gem "jekyll-redirect-from", "0.11.0"
 gem "jekyll-sitemap", "0.10.0"
 gem "jekyll-feed", "0.5.1"
@@ -17,4 +17,4 @@ gem "jekyll-coffeescript", "1.0.1"
 gem "jekyll-seo-tag", "2.0.0"
 gem "jekyll-github-metadata", "2.0.2"
 gem "listen", "3.0.6"
-gem "activesupport", "4.2.7"
+gem "activesupport", "5.2.4.3"
diff --git a/Gemfile.lock b/Gemfile.lock
index ee385b958b60a..422e790cb5205 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,11 +1,10 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.7)
-      i18n (~> 0.7)
-      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 (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     addressable (2.4.0)
     coffee-script (2.4.1)
@@ -13,16 +12,18 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     colorator (1.1.0)
+    concurrent-ruby (1.1.6)
     execjs (2.7.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.14)
+    ffi (1.12.2)
     forwardable-extended (2.6.0)
-    gemoji (2.1.0)
-    html-pipeline (2.4.2)
+    gemoji (3.0.1)
+    html-pipeline (2.12.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    i18n (0.7.0)
+    i18n (1.8.2)
+      concurrent-ruby (~> 1.0)
     jekyll (3.2.1)
       colorator (~> 1.0)
       jekyll-sass-converter (~> 1.0)
@@ -41,8 +42,7 @@ GEM
     jekyll-github-metadata (2.0.2)
       jekyll (~> 3.1)
       octokit (~> 4.0)
-    jekyll-mentions (1.2.0)
-      activesupport (~> 4.0)
+    jekyll-mentions (1.4.0)
       html-pipeline (~> 2.3)
       jekyll (~> 3.0)
     jekyll-paginate (1.1.0)
@@ -53,62 +53,62 @@ GEM
     jekyll-seo-tag (2.0.0)
       jekyll (~> 3.1)
     jekyll-sitemap (0.10.0)
-    jekyll-watch (1.5.0)
-      listen (~> 3.0, < 3.1)
-    jemoji (0.7.0)
-      activesupport (~> 4.0)
-      gemoji (~> 2.0)
+    jekyll-watch (1.5.1)
+      listen (~> 3.0)
+    jemoji (0.10.0)
+      gemoji (~> 3.0)
       html-pipeline (~> 2.2)
-      jekyll (>= 3.0)
-    json (1.8.3)
+      jekyll (~> 3.0)
     kramdown (1.11.1)
     liquid (3.0.6)
     listen (3.0.6)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9.7)
     mercenary (0.3.6)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.4.0)
     minima (1.1.0)
-    minitest (5.9.0)
+    minitest (5.14.1)
     multipart-post (2.0.0)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
+    nokogiri (1.10.9)
+      mini_portile2 (~> 2.4.0)
     octokit (4.3.0)
       sawyer (~> 0.7.0, >= 0.5.3)
-    pathutil (0.14.0)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    pkg-config (1.1.7)
-    rb-fsevent (0.9.7)
-    rb-inotify (0.9.7)
-      ffi (>= 0.5.0)
+    rb-fsevent (0.10.4)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     rouge (1.11.1)
-    safe_yaml (1.0.4)
-    sass (3.4.22)
+    safe_yaml (1.0.5)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     sawyer (0.7.0)
       addressable (>= 2.3.5, < 2.5)
       faraday (~> 0.8, < 0.10)
-    thread_safe (0.3.5)
-    tzinfo (1.2.2)
+    thread_safe (0.3.6)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  activesupport (= 4.2.7)
+  activesupport (= 5.2.4.3)
   jekyll (= 3.2.1)
   jekyll-coffeescript (= 1.0.1)
   jekyll-feed (= 0.5.1)
   jekyll-gist (= 1.4.0)
   jekyll-github-metadata (= 2.0.2)
-  jekyll-mentions (= 1.2.0)
+  jekyll-mentions (= 1.4.0)
   jekyll-paginate (= 1.1.0)
   jekyll-redirect-from (= 0.11.0)
   jekyll-sass-converter (= 1.3.0)
   jekyll-seo-tag (= 2.0.0)
   jekyll-sitemap (= 0.10.0)
-  jemoji (= 0.7.0)
+  jemoji (= 0.10.0)
   kramdown (= 1.11.1)
   liquid (= 3.0.6)
   listen (= 3.0.6)
@@ -116,4 +116,4 @@ DEPENDENCIES
   rouge (= 1.11.1)
 
 BUNDLED WITH
-   1.11.2
+   1.17.3