diff --git a/Gemfile b/Gemfile
index bca052d..1c99220 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,8 +6,8 @@ git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
 # gem "rails"
 
-gem "jekyll", "~> 3.8"
+gem "jekyll", "~> 4.1"
 
 gem "octopress-hooks", "~> 2.6"
 
-gem "git", "~> 1.5"
+gem "git", "~> 1.7"
diff --git a/Gemfile.lock b/Gemfile.lock
index c7f4b25..7866083 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,31 +14,36 @@ GEM
     git (1.7.0)
       rchardet (~> 1.8)
     http_parser.rb (0.6.0)
-    i18n (0.9.5)
+    i18n (1.8.3)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.7)
+    jekyll (4.1.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (~> 0.7)
-      jekyll-sass-converter (~> 1.0)
+      i18n (~> 1.0)
+      jekyll-sass-converter (~> 2.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
+      kramdown (~> 2.1)
+      kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
-      mercenary (~> 0.3.3)
+      mercenary (~> 0.4.0)
       pathutil (~> 0.9)
-      rouge (>= 1.7, < 4)
+      rouge (~> 3.0)
       safe_yaml (~> 1.0)
-    jekyll-sass-converter (1.5.2)
-      sass (~> 3.4)
+      terminal-table (~> 1.8)
+    jekyll-sass-converter (2.1.0)
+      sassc (> 2.0.1, < 3.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (1.17.0)
+    kramdown (2.2.1)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
     liquid (4.0.3)
     listen (3.2.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    mercenary (0.3.6)
+    mercenary (0.4.0)
     octopress-hooks (2.6.2)
       jekyll (>= 2.0)
     pathutil (0.16.2)
@@ -48,20 +53,21 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rchardet (1.8.0)
+    rexml (3.2.4)
     rouge (3.20.0)
     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)
+    sassc (2.4.0)
+      ffi (~> 1.9)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    unicode-display_width (1.7.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  git (~> 1.5)
-  jekyll (~> 3.8)
+  git (~> 1.7)
+  jekyll (~> 4.1)
   octopress-hooks (~> 2.6)
 
 BUNDLED WITH