diff --git a/web-ssh/Gemfile.lock b/web-ssh/Gemfile.lock
index 0ff9387..68ad2db 100644
--- a/web-ssh/Gemfile.lock
+++ b/web-ssh/Gemfile.lock
@@ -109,16 +109,16 @@ GEM
     msgpack (1.2.4)
     multi_json (1.13.1)
     net-ssh (5.0.2)
-    nio4r (2.3.1)
+    nio4r (2.5.8)
     nokogiri (1.11.4)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     pg (1.1.3)
     public_suffix (3.0.3)
+    puma (4.3.12)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
-    puma (4.3.8)
-      nio4r (~> 2.0)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.2)