diff --git a/Gemfile.lock b/Gemfile.lock
index ad911c6..744f18e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -119,7 +119,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (3.26.1)
+    rouge (3.27.0)
     ruby-enum (0.9.0)
       i18n
     ruby2_keywords (0.0.5)
diff --git a/Makefile b/Makefile
index 41a570c..9c9c399 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,9 @@ all: install
 install:
 	bundle install
 
+update:
+	bundle update
+
 serve:
 	bundle exec jekyll serve --livereload -H '*' --drafts