diff --git a/Gemfile.lock b/Gemfile.lock
index ff7e82f..e000294 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,4 +19,4 @@ DEPENDENCIES
   asciidoctor-revealjs
 
 BUNDLED WITH
-   1.17.3
+   2.1.4