diff --git a/Gemfile.lock b/Gemfile.lock
index bc658adf2..d8fd7b9ff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -87,7 +87,7 @@ GEM
     http_parser.rb (0.8.0)
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
-    io-event (1.4.0)
+    io-event (1.4.1)
     jmespath (1.6.2)
     kramdown (2.4.0)
       rexml