diff --git a/Gemfile.lock b/Gemfile.lock
index 7a12095..a57b9e1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,26 +17,28 @@ GEM
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     eventmachine (1.2.7)
+    ffi (1.15.5)
     ffi (1.15.5-x64-mingw-ucrt)
     forwardable-extended (2.6.0)
     http_parser.rb (0.8.0)
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    jekyll (4.2.2)
+    jekyll (4.3.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
       i18n (~> 1.0)
-      jekyll-sass-converter (~> 2.0)
+      jekyll-sass-converter (>= 2.0, < 4.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 2.3)
+      kramdown (~> 2.3, >= 2.3.1)
       kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
-      mercenary (~> 0.4.0)
+      mercenary (>= 0.3.6, < 0.5)
       pathutil (~> 0.9)
-      rouge (~> 3.0)
+      rouge (>= 3.0, < 5.0)
       safe_yaml (~> 1.0)
-      terminal-table (~> 2.0)
+      terminal-table (>= 1.8, < 4.0)
+      webrick (~> 1.7)
     jekyll-sass-converter (2.2.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-seo-tag (2.8.0)
@@ -60,17 +62,18 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (3.30.0)
+    rouge (4.0.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
-    terminal-table (2.0.0)
-      unicode-display_width (~> 1.1, >= 1.1.1)
-    unicode-display_width (1.8.0)
+    terminal-table (3.0.2)
+      unicode-display_width (>= 1.1.1, < 3)
+    unicode-display_width (2.3.0)
     webrick (1.7.0)
 
 PLATFORMS
   x64-mingw-ucrt
+  x86_64-linux
 
 DEPENDENCIES
   bundler (~> 2.3.5)