diff --git a/Gemfile.lock b/Gemfile.lock
index b1a90cb8..591c655f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -299,7 +299,7 @@ GEM
     mysql2 (0.4.10)
     nenv (0.3.0)
     netrc (0.11.0)
-    nio4r (2.1.0)
+    nio4r (2.3.1)
     nokogiri (1.8.3)
       mini_portile2 (~> 2.3.0)
     notiffany (0.1.1)
@@ -692,4 +692,4 @@ DEPENDENCIES
   whenever
 
 BUNDLED WITH
-   1.16.1
+   1.16.2