diff --git a/Gemfile b/Gemfile
index e29e26cdc833e..4a4904fb6a67e 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", "0.8.0"
+gem "jekyll-mentions", "1.3.0"
 gem "jekyll-redirect-from", "0.11.0"
 gem "jekyll-sitemap", "0.10.0"
 gem "jekyll-feed", "0.5.1"
diff --git a/Gemfile.lock b/Gemfile.lock
index ee385b958b60a..874cd5eb6196a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,16 +13,18 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     colorator (1.1.0)
+    concurrent-ruby (1.2.2)
     execjs (2.7.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.14)
+    ffi (1.16.3)
     forwardable-extended (2.6.0)
-    gemoji (2.1.0)
-    html-pipeline (2.4.2)
+    gemoji (3.0.1)
+    html-pipeline (2.14.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (3.2.1)
       colorator (~> 1.0)
       jekyll-sass-converter (~> 1.0)
@@ -41,7 +43,7 @@ GEM
     jekyll-github-metadata (2.0.2)
       jekyll (~> 3.1)
       octokit (~> 4.0)
-    jekyll-mentions (1.2.0)
+    jekyll-mentions (1.3.0)
       activesupport (~> 4.0)
       html-pipeline (~> 2.3)
       jekyll (~> 3.0)
@@ -53,43 +55,47 @@ 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)
+    jekyll-watch (1.5.1)
+      listen (~> 3.0)
+    jemoji (0.8.0)
       activesupport (~> 4.0)
-      gemoji (~> 2.0)
+      gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0)
-    json (1.8.3)
+    json (1.8.6)
     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 (2.8.5)
     minima (1.1.0)
-    minitest (5.9.0)
+    minitest (5.20.0)
     multipart-post (2.0.0)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
+    nokogiri (1.15.4)
+      mini_portile2 (~> 2.8.2)
+      racc (~> 1.4)
     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)
+    racc (1.7.3)
+    rb-fsevent (0.11.2)
+    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 (1.2.11)
       thread_safe (~> 0.1)
 
 PLATFORMS
@@ -102,13 +108,13 @@ DEPENDENCIES
   jekyll-feed (= 0.5.1)
   jekyll-gist (= 1.4.0)
   jekyll-github-metadata (= 2.0.2)
-  jekyll-mentions (= 1.2.0)
+  jekyll-mentions (= 1.3.0)
   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 (= 0.8.0)
   kramdown (= 1.11.1)
   liquid (= 3.0.6)
   listen (= 3.0.6)
@@ -116,4 +122,4 @@ DEPENDENCIES
   rouge (= 1.11.1)
 
 BUNDLED WITH
-   1.11.2
+   1.17.3