diff --git a/Gemfile.lock b/Gemfile.lock
index 07f3eaf..4db22b0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,12 +24,12 @@ GEM
     colorator (1.1.0)
     commonmarker (0.20.2)
       ruby-enum (~> 0.5)
-    concurrent-ruby (1.1.6)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.1.7)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
-    ffi (1.12.2)
+    ffi (1.13.1)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     html-pipeline (2.12.3)
@@ -68,8 +68,8 @@ GEM
       jekyll (>= 3.3, < 5.0)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-seo-tag (2.6.1)
-      jekyll (>= 3.3, < 5.0)
+    jekyll-seo-tag (2.7.1)
+      jekyll (>= 3.8, < 5.0)
     jekyll-sitemap (0.13.0)
       jekyll (~> 3.3)
     jekyll-watch (2.2.1)
@@ -90,11 +90,11 @@ GEM
       mini_portile2 (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.3)
-    rb-fsevent (0.10.3)
+    public_suffix (4.0.6)
+    rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.16.0)
+    rouge (3.24.0)
     ruby-enum (0.7.2)
       i18n
     safe_yaml (1.0.5)