diff --git a/Gemfile.lock b/Gemfile.lock
index bfcc5f7..c6cea67 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -195,7 +195,7 @@ GEM
     multi_test (0.1.2)
     mysql2 (0.5.2)
     nenv (0.3.0)
-    nio4r (2.5.1)
+    nio4r (2.5.2)
     nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.3)