diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 4893ee4..f4a0a68 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -179,7 +179,7 @@
     minitest (5.10.3)
     multipart-post (2.0.0)
     net-dns (0.8.0)
-    nokogiri (1.8.0)
+    nokogiri (1.8.1)
       mini_portile2 (~> 2.2.0)
     octokit (4.7.0)
       sawyer (~> 0.8.0, >= 0.5.3)