diff --git a/Gemfile.lock b/Gemfile.lock
index 63f31a1f35..785f9f3a7b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -345,7 +345,7 @@ GEM
     multipart-post (2.1.1)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
-    nio4r (2.5.2)
+    nio4r (2.5.7)
     nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)