diff --git a/Gemfile.lock b/Gemfile.lock
index a5911068b7..2808456061 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -126,7 +126,7 @@ GEM
     http_parser.rb (0.8.0)
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
-    io-event (1.7.3)
+    io-event (1.7.4)
     json (2.8.2)
     kramdown (2.5.1)
       rexml (>= 3.3.9)